Perhaps you should try some spelling variations:
"heir apparent" » "huir apparent", "her apparent", "herr apparent", "heir aparente", "heir parent"
"heir apparently" » "huir apparently", "her apparently", "herr apparently", "heir aparentely", "heir parently"
"hair apparent" » "hair aparente", "hair 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 ("heir apparently"))) OR ("hair apparent"))) OR ("weir apparent"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"heir apparent\") OR (\"heir apparently\"))) OR (\"hair apparent\"))) OR (\"weir apparent\"))".
• Removing quotes may allow a broader search: (((((( heir apparent ) OR ( heir apparently ))) OR ( hair apparent ))) OR ( weir apparent )).
• Adding a wildcard symbol may retrieve word variants: (((((("heir apparent") OR ("heir apparently"))) OR ("hair apparent"))) OR ("weir apparent"))*.