Perhaps you should try some spelling variations:
"heir apparent" » "huir apparent", "her apparent", "heir apparently", "heir aparente", "heir apaparente", "heir apparental"
"heir aaparentees" » "huir aaparentees", "her aaparentees", "heir aaaparenteees", "heir aaparentalees"
"heir parent" » "huir parent", "her parent", "heir aparente", "heir parental"
"heim aparentes" » "him aparentes", "heim aparente", "heim patentes", "heim parente", "heim aaparentees", "heim aparentales"

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 ((("heir aaparentees") OR ("heim aparentes"))))) OR ("heir parent"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"heir apparent\") OR (((\"heir aaparentees\") OR (\"heim aparentes\"))))) OR (\"heir parent\"))*".
• Removing quotes may allow a broader search: (((( heir apparent ) OR ((( heir aaparentees ) OR ( heim aparentes ))))) OR ( heir parent ))*.