Perhaps you should try some spelling variations:
"monotypic axon" » "monotypic saxon", "monotypic faxon", "monotypic aon"
"genotypic taxon" » "genotypic tsaxon", "genotypic tfaxon", "genotypic taon", "genotipico taxon", "genotyping taxon", "genotype taxon", "genotypic saxon", "genotypic faxon", "genotypic taxol"
"phenotypic taxon" » "phenotypic tsaxon", "phenotypic tfaxon", "phenotypic taon", "phenotypic saxon", "phenotypic faxon", "phenotypic taxol", "phenotype taxon", "phenotypes taxon"

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

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