Perhaps you should try some spelling variations:
"heir apparent" » "her apparent", "heim apparent", "heir apparently", "heir aparente", "heir apaparente", "heir apparental"
"huir apparent" » "huir apparently", "huir aparente", "huir apaparente", "huir apparental"
"weir apparent" » "weir apparently", "weir aparente", "weir apaparente", "weir apparental", "weis apparent"
"herr parent" » "here parent", "her parent", "herr aparente", "herr parental"

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 ("herr parent"))) OR ("huir apparent"))) OR ("weir apparent"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"heir apparent\") OR (\"herr parent\"))) OR (\"huir apparent\"))) OR (\"weir apparent\"))".
• Removing quotes may allow a broader search: (((((( heir apparent ) OR ( herr parent ))) OR ( huir apparent ))) OR ( weir apparent )).
• Adding a wildcard symbol may retrieve word variants: (((((("heir apparent") OR ("herr parent"))) OR ("huir apparent"))) OR ("weir apparent"))*.