Perhaps you should try some spelling variations:
"heir apparent" » "huir apparent", "her apparent", "hair apparent", "heir apparently", "heir aparente", "heir apaparente", "heir apparental"
"heir apparentally" » "huir apparentally", "her apparentally", "hair apparentally", "heir apparentlyally", "heir aparenteally", "heir apparently", "heir apaparenteally", "heir apparentalally"
"heir parent" » "huir parent", "her parent", "hair parent", "heir aparente", "heir parental"
"weir apaparente" » "weis apaparente", "wei apaparente", "weil apaparente", "weir aparente", "weir apaaparentee", "weir apaparentale"

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