Perhaps you should try some spelling variations:
"heir apparent" » "her apparent", "hair apparent", "herr 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", "weis apparent", "wei apparent", "weil apparent", "weir apaparente", "weir apparental"
"weir parent" » "weis parent", "wei parent", "weil parent", "weir aparente", "weir 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 ("huir apparent"))) OR ((("weir apparent") OR ("weir parent"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"heir apparent\") OR (\"huir apparent\"))) OR (((\"weir apparent\") OR (\"weir parent\"))))".
• Removing quotes may allow a broader search: (((( heir apparent ) OR ( huir apparent ))) OR ((( weir apparent ) OR ( weir parent )))).
• Adding a wildcard symbol may retrieve word variants: (((("heir apparent") OR ("huir apparent"))) OR ((("weir apparent") OR ("weir parent"))))*.