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

You may be able to get more results by adjusting your search query.

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