Perhaps you should try some spelling variations:
"coder coder modified subgraph problem" » "coder coder modified straps problem" (Expand search), "coder coder modified subgradient problem" (Expand search), "coder copper modified subgraph problem" (Expand search), "coder powder modified subgraph problem" (Expand search), "coder under modified subgraph problem" (Expand search), "coder decoder modified subgraph problem" (Expand search), "code code modified subgraph problem" (Expand search), "decoder codec modified subgraph 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 coder modified subgraph problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder modified subgraph problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder modified subgraph problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder modified subgraph problem") OR ("api python python python programming"))*.