Perhaps you should try some spelling variations:
"coder code coverage obstacle problem" » "coder code inverse obstacle problem" (Expand search), "coder code over obstacle problem" (Expand search), "coder care coverage obstacle problem" (Expand search), "coder and coverage obstacle problem" (Expand search), "coder the coverage obstacle problem" (Expand search), "code code coverage obstacle problem" (Expand search), "modern code coverage obstacle problem" (Expand search), "color code coverage obstacle 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 coverage obstacle problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder code coverage obstacle problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder code coverage obstacle problem") OR ("api python python python programming"))*.