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

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