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