Perhaps you should try some spelling variations:
"coder coding refractive index problem" » "coder varying refractive index problem" (Expand search), "coder on refractive index problem" (Expand search), "coder in refractive index problem" (Expand search), "coder coding refractive linde problem" (Expand search), "coder coding refractive gender problem" (Expand search), "coder coding refractive index profiles" (Expand search), "modern coding refractive index problem" (Expand search), "color coding refractive index problem" (Expand search), "odor coding refractive index 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), "manim 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 coding refractive index problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coding refractive index problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coding refractive index problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coding refractive index problem") OR ("api python python python programming"))*.