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

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