Perhaps you should try some spelling variations:
recessions » regressions
recursion » recursions, recursive, excursion
recursos » precursors, precursor
reversion » version, aversion, reversing
revision » provision, decision, division
diversion » version, division, diversity
recession » regression

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (recessions or ((((recursion or recursos) or (reversion OR revision)) or diversion) or recession))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (recessions OR ((((recursion OR recursos) OR (reversion OR revision)) OR diversion) OR recession)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(recessions or ((((recursion or recursos) or (reversion OR revision)) or diversion) or recession))".
• Adding a wildcard symbol may retrieve word variants: (recessions or ((((recursion or recursos) or (reversion OR revision)) or diversion) or recession))*.