Perhaps you should try some spelling variations:
"mrsa colonization history" » "mrsa communication history", "mrsa organization history", "mrsa cooperation history", "mars colonization history", "coca colonization history", "its colonization history"
"re decolonization case" » "re decolonization across", "re decolonization notes", "re decolonization _", "_ decolonization case", "re colonization case", "box decolonization case"
"early cooperation state" » "early operation state", "early cooperative state", "energy cooperation state", "early cooperation scale", "early cooperation strategy"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("mrsa colonization history") or ((("early cooperation state") or ("re decolonization case"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("mrsa colonization history") OR ((("early cooperation state") OR ("re decolonization case")))).
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• Adding a wildcard symbol may retrieve word variants: (("mrsa colonization history") or ((("early cooperation state") or ("re decolonization case"))))*.