Perhaps you should try some spelling variations:
"planes generales" » "plants general", "almacenes generales", "apuntes generales"
"temas generales" » "temas centrales", "teorias generales", "normas generales", "themes generales", "leyes generales"
"temas general" » "themes general", "leyes general"
"games general" » "examen general", "themes general", "viajes general"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("temas generales") or ("planes generales"))) or ((("temas general") or ("games general"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("temas generales") OR ("planes generales"))) OR ((("temas general") OR ("games general")))).
• Removing quotes may allow a broader search: (((( temas generales ) or ( planes generales ))) or ((( temas general ) or ( games general )))).
• Adding a wildcard symbol may retrieve word variants: (((("temas generales") or ("planes generales"))) or ((("temas general") or ("games general"))))*.