Perhaps you should try some spelling variations:
"venezuela, republic bolivia _" » "venezuela, republic bohemia _", "venezuela, republic political _", "venezuela, republic politics _"
"venezuela, republic moravia _" » "venezuela, republic moravian _", "venezuela, republic morava _", "venezuela, republic moralia _"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"venezuela, republic bolivia _\") OR (\"venezuela, republic moravia _\"))".
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