Perhaps you should try some spelling variations:
"genotypic axon" » "genotipico axon", "genotyping axon", "genotype axon", "genotypic faxon", "genotypic taxon", "genotypic aon"
"phenotypic axon" » "phenotypic faxon", "phenotypic taxon", "phenotypic aon", "phenotype axon", "phenotypes axon"
"monotypic saxon" » "monotypic sfaxon", "monotypic staxon", "monotypic saon", "monotypic salon", "monotypic saxo"
"monotypic saon" » "monotypic salon", "monotypic sajon", "monotypic sapon"

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

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