You can try to create a docset from the offline documentation in your engine path, then you can conveniently search for what you want using Dash(Mac) or Zeal(Windows).
- The method for creating the docset can be referenced at: GitHub - melMass/docset-unreal-engine: Python Module to Generate a Dash Compatible Docset from Unreal Engine Documentation
- Offline documentation file path:
YourEngineRoot/Engine/Documentation/Builds/