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• Performing a fuzzy search may retrieve terms with similar spellings: (("islamic republic of iron") OR ("islamic public of iron"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"islamic republic of iron\") OR (\"islamic public of iron\"))".
• Removing quotes may allow a broader search: (( islamic republic of iron ) OR ( islamic public of iron )).
• Adding a wildcard symbol may retrieve word variants: (("islamic republic of iron") OR ("islamic public of iron"))*.