Perhaps you should try some spelling variations:
"heir apparent" » "huir apparent", "her apparent", "hair apparent", "heir apparently", "heir aparente", "heir parent"
"weir apparental" » "weir apparentlyal", "weir aparenteal", "weir parental", "weis apparental", "wei apparental", "weil apparental", "weir apparently", "weir aparentan"
"weir aparenteal" » "weis aparenteal", "wei aparenteal", "weil aparenteal", "weir aparente", "weir parental", "weir aparentan"
"weir parently" » "weis parently", "wei parently", "weil parently", "weir apparently", "weir parental", "weir 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 (((((\"weir apparental\") OR (\"weir aparenteal\"))) OR (\"weir parently\"))))~".
• Removing quotes may allow a broader search: (( heir apparent ) OR ((((( weir apparental ) OR ( weir aparenteal ))) OR ( weir parently ))))~.
• Adding a wildcard symbol may retrieve word variants: (("heir apparent") OR ((((("weir apparental") OR ("weir aparenteal"))) OR ("weir parently"))))*.