Perhaps you should try some spelling variations:
"_ communication history" » "_ telecommunication history", "_ communication sector", "_ communication theory"
"africa urbanization issues" » "america urbanization issues", "african urbanisation issues", "africa organization issues", "africa organizations issues", "africa organizational issues"
"jews colonization failed" » "jews colonization still", "jews organizations failed", "its colonization failed", "mars colonization failed", "re colonization failed"

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