Perhaps you should try some spelling variations:
"heir apparent" » "weir apparent", "hair apparent", "herr apparent", "heir apparently", "heir aparente", "heir apaparente", "heir apparental"
"heir parent" » "weir parent", "hair parent", "herr parent", "heir aparente", "heir parental"
"her apparent" » "her apparently", "her aparente", "her apaparente", "her apparental"
"huir aparentale" » "huir aparente", "huir parental", "huir parentales", "huir aaparenteale", "huir aparentalale"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((((("heir apparent") OR ("her apparent"))) OR ("huir aparentale"))) OR ("heir parent"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"heir apparent\") OR (\"her apparent\"))) OR (\"huir aparentale\"))) OR (\"heir parent\"))*".
• Removing quotes may allow a broader search: (((((( heir apparent ) OR ( her apparent ))) OR ( huir aparentale ))) OR ( heir parent ))*.