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