Perhaps you should try some spelling variations:
"coder code based validation problem" » "coder code based variation problem" (Expand search), "coder code based calibration problem" (Expand search), "coder code based realization problem" (Expand search), "coder code based valuation problem" (Expand search), "coder code and validation problem" (Expand search), "code code based validation problem" (Expand search), "modern code based validation problem" (Expand search), "color code based validation problem" (Expand search), "coder case based validation 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 code based validation problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder code based validation problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder code based validation problem") OR ("api python python python programming"))*.