Perhaps you should try some spelling variations:
"coder coder topic matching problem" » "coder coder topic packing problem" (Expand search), "coder coder topic teaching problem" (Expand search), "coder coder topic cutting problem" (Expand search), "coder decoder topic matching problem" (Expand search), "code code topic matching problem" (Expand search), "decoder codec topic matching problem" (Expand search), "coder power topic matching problem" (Expand search), "coder modern topics matching problem" (Expand search), "coder cancer topic matching 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)

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 topic matching problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder topic matching problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder topic matching problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder topic matching problem") OR ("api python python python programming"))*.