Summary: GSA returns a message saying - "In order to show you the most relevant results, we have omitted some entries very similar to the 4 already displayed. If you like, you can repeat the search with the omitted results included.".
Cause: : In order to provide the best possible relevancy the GSA may remove some results, by default two filters acting on snippets and directories(web directory structure) will seek to limit results which appear to be too similar.
Fix: The "filter" query URL parameter allows to deactivate the filtering. (both are enabled by default).
- filter=0 : deactivate all filters
- filter=p : deactivate the directory filtering
- filter=s : deactivate the snippet filtering
There is more details in our documentation: