Perhaps you should try some spelling variations:
"heir apparent" » "her apparent", "heir apparently", "heir aparente", "heir apparente", "heir apparents", "heir apaparente"
"heir parent" » "her parent", "heir parente", "heir parents", "heir aparente"
"hair apparental" » "hair apparentlyal", "hair aparenteal", "fair apparental", "air apparental", "nair apparental", "hair parental", "hair apparently", "hair aparentan", "hair apparenteal", "hair apparentsal", "hair apaparenteal"
"weir aparentely" » "weis aparentely", "weir aparente", "weir apparently", "weir aparenteely", "weir aparentsely", "weir aaparenteely"

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 (\"hair apparental\"))) OR (\"weir aparentely\"))) OR (\"heir parent\"))~".
• Removing quotes may allow a broader search: (((((( heir apparent ) OR ( hair apparental ))) OR ( weir aparentely ))) OR ( heir parent ))~.
• Adding a wildcard symbol may retrieve word variants: (((((("heir apparent") OR ("hair apparental"))) OR ("weir aparentely"))) OR ("heir parent"))*.