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