Perhaps you should try some spelling variations:
"coder refraction errors and problem" » "coder refractive errors and problem" (Expand search), "coder refractive error and problem" (Expand search), "coder prediction errors and problem" (Expand search), "index refraction errors and problem" (Expand search), "corneal refraction errors and problem" (Expand search), "ocular refraction errors and problem" (Expand search), "coder refraction errors in problem" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pitons python python programming" (Expand search), "rpa python python python programming" (Expand search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder refraction errors and problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder refraction errors and problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder refraction errors and problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder refraction errors and problem") OR ("api python python python programming"))*.