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

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: "((((((\"monotypic taxon\") OR (\"monotypic taxol\"))) OR (\"monotypic axon\"))) OR (\"monotypic saxon\"))~".
• Removing quotes may allow a broader search: (((((( monotypic taxon ) OR ( monotypic taxol ))) OR ( monotypic axon ))) OR ( monotypic saxon ))~.
• Adding a wildcard symbol may retrieve word variants: (((((("monotypic taxon") OR ("monotypic taxol"))) OR ("monotypic axon"))) OR ("monotypic saxon"))*.