Perhaps you should try some spelling variations:
"heir apparent" » "huir apparent", "her apparent", "weir apparent", "heir apparently", "heir aparente", "heir apaparente", "heir apparental"
"heir parentales" » "huir parentales", "her parentales", "weir parentales", "heir parental", "heir aparenteales", "heir parentalales"
"heir aparentalalely" » "huir aparentalalely", "her aparentalalely", "weir aparentalalely", "heir aaparentealalely", "heir aparentalalalely"
"heir parent" » "huir parent", "her parent", "weir parent", "heir aparente", "heir parental"

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

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