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

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

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