Perhaps you should try some spelling variations:
"heir apparent" » "huir apparent", "heim apparent", "heir apparently", "heir apparental"
"heir aparentes" » "huir aparentes", "heim aparentes", "heir patentes", "heir parente", "heir parientes", "heir apareces", "heir aparentales"
"heir aparente" » "huir aparente", "heim aparente", "heir aparece", "heir aparentale"
"her parent" » "her 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 aparentes\") OR (\"heir aparente\"))))) OR (\"her parent\"))~".
• Removing quotes may allow a broader search: (((( heir apparent ) OR ((( heir aparentes ) OR ( heir aparente ))))) OR ( her parent ))~.
• Adding a wildcard symbol may retrieve word variants: (((("heir apparent") OR ((("heir aparentes") OR ("heir aparente"))))) OR ("her parent"))*.