Perhaps you should try some spelling variations:
"heir apparent" » "huir apparent", "her apparent", "weir apparent", "heir aparente"
"heir parent" » "huir parent", "her parent", "weir parent"
"heir parently" » "huir parently", "her parently", "weir parently", "heir parental", "heir parente", "heir parents"
"wei apparently" » "wei aparentely", "wei apparental", "wei apparente", "wei apparents"

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 parent\"))) OR (\"heir parently\"))) OR (\"wei apparently\"))~".
• Removing quotes may allow a broader search: (((((( heir apparent ) OR ( heir parent ))) OR ( heir parently ))) OR ( wei apparently ))~.
• Adding a wildcard symbol may retrieve word variants: (((((("heir apparent") OR ("heir parent"))) OR ("heir parently"))) OR ("wei apparently"))*.