Perhaps you should try some spelling variations:
"coder xcode java graph problems" » "coder xcode java math problems" (Expand search), "coder xcode java path problems" (Expand search), "coder xcode java subgraph problem" (Expand search), "code code java graph problems" (Expand search), "coder decoder java graph problems" (Expand search), "coder codes java graph problems" (Expand search), "coder xcode java grass 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 xcode java graph problems") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder xcode java graph problems\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder xcode java graph problems ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder xcode java graph problems") OR ("api python python python programming"))*.