Perhaps you should try some spelling variations:
"its colonization history" » "its communication history", "its organization history", "its cooperation history", "anti colonization history", "jews colonization history", "mars colonization history"
"mrsa colonization history" » "mrsa communication history", "mrsa organization history", "mrsa cooperation history", "mars colonization history", "coca colonization history", "pro colonization history"
"mars cooperation scale" » "mars cooperation case", "mars cooperation state", "mars cooperation sara", "early cooperation scale", "area cooperation scale", "arab cooperation scale"

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: (((("its colonization history") or ("mrsa colonization history"))) or ("mars cooperation scale"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("its colonization history") OR ("mrsa colonization history"))) OR ("mars cooperation scale")).
• Removing quotes may allow a broader search: (((( its colonization history ) or ( mrsa colonization history ))) or ( mars cooperation scale )).
• Adding a wildcard symbol may retrieve word variants: (((("its colonization history") or ("mrsa colonization history"))) or ("mars cooperation scale"))*.