Perhaps you should try some spelling variations:
recursoss » recursos, precursors, recursions
reversions » perversions, revisions, reversing, versions, aversions, diversions
recessions » regressions
recursion » recursions, recursive, recursos
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: ((recursoss or (reversions or recessions)) or ((recursion OR reversion) or recession))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((recursoss OR (reversions OR recessions)) OR ((recursion OR reversion) OR recession)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((recursoss or (reversions or recessions)) or ((recursion OR reversion) or recession))".
• Adding a wildcard symbol may retrieve word variants: ((recursoss or (reversions or recessions)) or ((recursion OR reversion) or recession))*.