Perhaps you should try some spelling variations:
"planificacion estrategias" » "planificacion estrategia", "planificacion estrategica", "aplicacion estrategias"
"gamificacion estrategias" » "comunicacion estrategias", "aplicacion estrategias", "planificacion estrategia", "planificacion estrategicas", "gamification strategys"
"communication strategies" » "communicative strategies", "communication systems", "cooperation strategies"
"gamificacion estrategia" » "planificacion estrategica", "comunicacion estrategia", "gamification strategy"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("planificacion estrategias") or ((("gamificacion estrategias") or ("communication strategies"))))) or ("gamificacion estrategia"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("planificacion estrategias") OR ((("gamificacion estrategias") OR ("communication strategies"))))) OR ("gamificacion estrategia")).
• Removing quotes may allow a broader search: (((( planificacion estrategias ) or ((( gamificacion estrategias ) or ( communication strategies ))))) or ( gamificacion estrategia )).
• Adding a wildcard symbol may retrieve word variants: (((("planificacion estrategias") or ((("gamificacion estrategias") or ("communication strategies"))))) or ("gamificacion estrategia"))*.