Perhaps you should try some spelling variations:
"mars communication israel" » "mars communication issues", "mars communication iran", "mars communication iraq", "mass communication israel", "mass communications israel", "markets communication israel"
"mars communication theory" » "mars communication technology", "mass communication theory", "mass communications theory", "markets communication theory"
"china cooperation scale" » "asian cooperation scale", "regional cooperation scale", "china cooperation case", "china cooperation state", "china cooperation sara"

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

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