Perhaps you should try some spelling variations:
"monotypic aon" » "genotypic aon"
"monotypic saxon" » "genotypic saxon", "monotypic salon", "monotypic saxo"
"monotypic taxon" » "genotypic taxon", "monotypic talon", "monotypic axon", "monotypic faxon"
"monotypic varon" » "genotypic varon", "monotypic aaron", "monotypic baron", "monotypic veron"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("monotypic aon") OR ("monotypic saxon"))) OR ((("monotypic taxon") OR ("monotypic varon"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"monotypic aon\") OR (\"monotypic saxon\"))) OR (((\"monotypic taxon\") OR (\"monotypic varon\"))))".
• Removing quotes may allow a broader search: (((( monotypic aon ) OR ( monotypic saxon ))) OR ((( monotypic taxon ) OR ( monotypic varon )))).
• Adding a wildcard symbol may retrieve word variants: (((("monotypic aon") OR ("monotypic saxon"))) OR ((("monotypic taxon") OR ("monotypic varon"))))*.