Perhaps you should try some spelling variations:
"ngo communication israel" » "ngo communication issues", "ngo communication iran", "ngo communication iraq", "togo communications israel", "de communication israel", "3 communication israel"
"_ cooperation history" » "_ corporation history", "_ federation history"
"mars colonization songs" » "mars colonization still", "mars colonization work", "mars decolonization notes", "mrsa colonization songs", "its colonization songs", "jews colonization songs"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("_ cooperation history") or ("mars colonization songs"))) or ("ngo communication israel"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("_ cooperation history") OR ("mars colonization songs"))) OR ("ngo communication israel")).
• Removing quotes may allow a broader search: (((( _ cooperation history ) or ( mars colonization songs ))) or ( ngo communication israel )).
• Adding a wildcard symbol may retrieve word variants: (((("_ cooperation history") or ("mars colonization songs"))) or ("ngo communication israel"))*.