Perhaps you should try some spelling variations:
"coder coder parallel subgroup problem" » "coder coder parallel group problem" (Expand search), "coder coder parallel subgraph problem" (Expand search), "coder coder parallel groups problem" (Expand search), "coder over parallel subgroup problem" (Expand search), "coder adder parallel subgroup problem" (Expand search), "coder power parallel subgroup problem" (Expand search), "coder decoder parallel subgroup problem" (Expand search), "code code parallel subgroup problem" (Expand search), "decoder codec parallel subgroup 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 parallel subgroup problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder parallel subgroup problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder parallel subgroup problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder parallel subgroup problem") OR ("api python python python programming"))*.