Perhaps you should try some spelling variations:
"nets communication issues" » "nets community issues", "nets communication india", "nets communication united", "lea's communication issues", "mass communication issues", "les communications issues"
"_ colonization history" » "_ communication history", "_ organization history", "_ cooperation history"
"c's communication iraq" » "c's communication iran", "c's communication israel", "c's communication italy", "lea's communication iraq", "class communication iraq", "mass communication iraq"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("_ colonization history") OR ((("c's communication iraq") OR ("nets communication issues"))))~.
• Removing quotes may allow a broader search: (( _ colonization history ) or ((( c's communication iraq ) or ( nets communication issues ))))~.
• Adding a wildcard symbol may retrieve word variants: (("_ colonization history") or ((("c's communication iraq") or ("nets communication issues"))))*.