Trying to find any search in the global search form, any know value that should appear
There is always zero result
Resolve the search query
@santyabreu what about your cron? is it activated?
Like vovpff suggested, you need CRON to search. Basically, CRON (scheduling service), run a Task (Update Index), Search (Ctrl+Find information from index).
You might also want to change the UI Search field to include more search information. Anyway once CRON is activate and run successfully you can search.
@santyabreu check u_yf_crmentity_search_label table in your CRM database. This table must be filled with a lot of data for every crmid in you system.