[DOC] Missing content related to 'searching data'

[hdhalter]

What do you want to do?

Add new

Tell us about your request. Provide a summary of the request.
Missing content for the following concepts:

• collapse search results. Fixed by Collapsing search results new page added to documentation  #7919
• filter search results. Fixed by Adding documentation for filter search in OpenSearch #7900
• retrieve inner hits. Fixed by Adding inner hits docs #7677
• retrieve selected fields. Fixed by Adding retrieve specific fields docs #7664
• search shard routing. Fixed by Adding search shard routing docs #7656

*Version: List the OpenSearch version to which this issue applies, e.g. 2.14, 2.12--2.14, or all.
all

What other resources are available? Provide links to related issues, POCs, steps for testing, etc.

[leanneeliatra]

I'll be starting with:

1. filter search results
2. collapse search results

I know @AntonEliatra is currently looking into:

1. search shard routing

[leanneeliatra]

1. filter search results Fixed by Filtering search results documentation addition #7667
2. collapse search results Fixed by Collapsing search results new page added to documentation #7678
   cc @hdhalter