Perhaps you should try some spelling variations:
"coder optimization and string problem" » "code optimization and string problem" (Expand search), "modern optimization and string problem" (Expand search), "powder optimization and string problem" (Expand search), "coder optimization and sizing problem" (Expand search), "coder optimization and rostering problem" (Expand search), "coder optimization and sharing problems" (Expand search), "coder optimization and strong problem" (Expand search), "coder optimization and spring problem" (Expand search), "coder optimization and sharing 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder optimization and string problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder optimization and string problem\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder optimization and string problem ) OR ( api python python python programming ))*.