Perhaps you should try some spelling variations:
"coder coverage in string problems" » "coder coverage in string problem" (Expand search), "coder coverage in sharing problems" (Expand search), "coder coverage in sorting problems" (Expand search), "code coverage in string problems" (Expand search), "cancer coverage in string problems" (Expand search), "center coverage in string problems" (Expand search), "coder coverage of string problems" (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 coverage in string problems") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coverage in string problems\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coverage in string problems ) OR ( api python python python programming ))*.