Perhaps you should try some spelling variations:
"monotypic taxon" » "monotypic talon", "monotypic faxon", "monotypic taxol", "monotypic tfaxon", "monotypic taon", "monotypic taron"
"genotypic taxon" » "genotypic talon", "genotypic faxon", "genotypic taxol", "genotipico taxon", "genotyping taxon", "phenotypic taxon", "genotypic tfaxon", "genotypic taon", "genotypic taron"
"monotypic saxon" » "monotypic salon", "monotypic saxo", "monotypic sfaxon", "monotypic saon", "monotypic saron"
"genotypic axon" » "genotipico axon", "genotyping axon", "phenotypic axon", "genotypic faxon", "genotypic aon", "genotypic aron"

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

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