Perhaps you should try some spelling variations:
"heir apparent" » "her apparent", "herr apparent", "meir apparent", "heir aparente", "heir parent"
"hair apparently" » "hair aparentely", "hair parently"
"huir apparent" » "huir aparente", "huir parent"
"weir apparent" » "weir aparente", "weir parent", "weis apparent", "wei apparent", "weil apparent"

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