Perhaps you should try some spelling variations:
recursos » precursors, precursor
aversions » aversion, versions, diversions
reversion » version, aversion, revision
diversion » version, division, diversity
recursion » recursive, excursion
recursions » recursives, excursions, recessions
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: ((recursos or (aversions or (reversion or diversion))) or ((recursion OR recursions) or recession))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((recursos OR (aversions OR (reversion OR diversion))) OR ((recursion OR recursions) OR recession)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((recursos or (aversions or (reversion or diversion))) or ((recursion OR recursions) or recession))".
• Adding a wildcard symbol may retrieve word variants: ((recursos or (aversions or (reversion or diversion))) or ((recursion OR recursions) or recession))*.