Perhaps you should try some spelling variations:
"participacion motivos research" » "participacion activa research", "participacion politicas research", "participacion social research"
"participation action research" » "participatory action research", "participacion activa research"
"participativa action research" » "participatory action research", "participativa aida research", "participacion activa research"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("participation action research") OR ("participacion motivos research"))) OR ("participativa action research"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"participation action research\") OR (\"participacion motivos research\"))) OR (\"participativa action research\"))".
• Removing quotes may allow a broader search: (((( participation action research ) OR ( participacion motivos research ))) OR ( participativa action research )).
• Adding a wildcard symbol may retrieve word variants: (((("participation action research") OR ("participacion motivos research"))) OR ("participativa action research"))*.