SharePoint 2010 Search Results 
Disclaimer: The information below can be specific to particular SharePoint environmental issues. The workarounds may or may not be suitable for your environment. Please consult your SharePoint Administrator before performing any changes to your SharePoint production environment.

Protocol handler that crawls the SharePoint content will not populate ows_created_x0020_Date(Text) crawled property.

1.

How to map CreatedDate field to crawled field?

  • Open Central Administration, in the Application Management section, click Manage service applications. 
  • Click the Search service application for which you are viewing managed and crawled properties.
  • On the Search Administration page, in the Quick Launch, under Queries and Results, click Metadata Properties.
  • On the Metadata Property Mappings page, click New Managed Property.
  • On the New Managed Property page, in the Property name box in the Name and type section, type the name of the new managed property.
  • In the Description box, type a description of the property.
  • Under The type of information in this property, select one of the following options for the property:
  • Under The type of information in this propertyText type
  • In the Mappings to crawled properties section, select Include values from a single crawled property based on the order specified
  • Click Ok

2..

How crawling will affect export process of search results?

For example, if you perform search for the search query, Author='John Doe' using Trial Search dialog, the search results may contain 1205 records approximately. During export process, search results count may increase to 1250 records approximately due to the incremental crawling of the content source.

3.

How to avoid the "System.Services.TimeoutException" during export process of search results in SPListX?

During frequent usage of SharePoint, SharePoint Search services cannot serve the search request within the stipulated time therefore, SharePoint search server itself throws an System.ServiceProcess.TimeoutException. To avoid this exception, we strongly recommend you to perform search export process during off-peak hours.

4. How stemming will help you to get related search results?

Stemming will bring back words closely related to the query terms i.e inflectional variants for most languages, but for some languages derivational variants as well.

For example, sample search queries with search results.

S.No Search Keywords Search Results
1. run In addition to exact match, it will bring back matches on "runs","ran","running".
2. page In addition to exact match, it will bring back matches on "pages","paged", and "paging".

5. How to enable stemming in SharePoint 2010?
  • Go to the search page, enter any query to return the search results page. For ex:enter keyword 'sharepoint' in anykeywords text box..
  • Under Site Actions, select 'Edit page'.
  • Locate the 'Search Core Results' web part (usually in the bottom zone).
  • From the Edit button, select 'Modify shared web part .
  • In the task pane that appears on the right hand side, under 'Results Query Options', select 'Enable Search Term Stemming' checkbox.

Note: If stemming is switched on, it will increase your index size and potentially impact search performance.

6. What is meant by Trimming Duplicate Search Results?
To specify whether duplicate list item URLs should be removed from search results.
7. How to view duplicate search results in SharePoint  2010?
  • Go to the search page; enter any query to return the search results page. For example: enter keyword 'sharepoint' in any keywords text box..
  • Under Site Actions, select 'Edit page'
  • Locate the 'Search Core Results' web part (usually in the bottom zone)
  • From the Edit button, select 'Modify shared web part
  • In the task pane that appears on the right hand side, under 'Results Query Options', check the box labeled ' Remove Duplicate Results '.