Perhaps you should try some spelling variations:
"coder coder valipar concurrent programming" » "coder coder valipar constraint programming" (Expand search), "coder coder saliva concurrent programming" (Expand search), "coder coder validade concorrente programming" (Expand search), "coder decoder valipar concurrent programming" (Expand search), "code code valipar concurrent programming" (Expand search), "decoder codec valipar concurrent programming" (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 valipar concurrent programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder valipar concurrent programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder valipar concurrent programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder valipar concurrent programming") OR ("api python python python programming"))*.