Perhaps you should try some spelling variations:
"cuba foreign regulation united state." » "cuba foreign relations united state.", "cuba foreign legislation united state.", "cuba foreign education united state.", "cuban foreign regulation united state.", "a foreign regulation united state.", "eu foreign regulation united state.", "cuba foreign regulation united states.", "cuba foreign regulation zunited states."
"cuba foreign regulation unitec late." » "cuba foreign relations unitec late.", "cuba foreign legislation united late.", "cuba foreign education united late.", "cuban foreign regulation unitec late.", "a foreign regulation unitec late.", "eu foreign regulation unitec late.", "cuba foreign regulation united latin."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("cuba foreign regulation united state.") OR ("cuba foreign regulation unitec late."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"cuba foreign regulation united state.\") OR (\"cuba foreign regulation unitec late.\"))".
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• Adding a wildcard symbol may retrieve word variants: (("cuba foreign regulation united state.") OR ("cuba foreign regulation unitec late."))*.