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