Fixes to Search mechanism main search bar)

[agpul]

• [ ] narrowing the search results in the main search engine (there are too many results)

Examples of user answers:

• Again, the problem is finding exactly the information I search for.
• not satisfied, to chaotic
• Finding publications on "climate change" worked well (but usually research questions are less broad and the challenge is finding few fitting publications in a large amount of results)
• None of the initial results seemed relevant to mud volcanism, instead being related to taxonomy of insects and fish. I got 2,343,258 search results.
• I missed the precision

[agpul]

not relevant for now