Perhaps you should try some spelling variations:
"coder refractive error detection problem" » "coder refractive error selection problem" (Expand search), "coder refractive error detection program" (Expand search), "coder refractive error demarcation problem" (Expand search), "poder refrativo error detection problem" (Expand search), "after refractive error detection problem" (Expand search), "laser refractive error detection problem" (Expand search), "coder refractive errors detection problem" (Expand search), "coder refractive error correction 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder refractive error detection problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder refractive error detection problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder refractive error detection problem") OR ("api python python python programming"))*.