Perhaps you should try some spelling variations:
"coder computational model concurrent program" » "code computational model concurrent program" (Expand search), "poder computacional model concurrent program" (Expand search), "model computational model concurrent program" (Expand search), "coder computational modeling concurrent program" (Expand search), "coder computational model concurrent programs" (Expand search), "coder computational model concurrent programming" (Expand search), "coder computational model current program" (Expand search), "coder computational power concurrent program" (Expand search), "coder computational of concurrent program" (Expand search)
"using coding python python programming" » "using codigo python python programming" (Expand search), "using codigos python python programming" (Expand search), "using using python python programming" (Expand search), "using coding pythons python programming" (Expand search), "using coding piton python programming" (Expand search), "using coding pitons python programming" (Expand search), "using coping python python programming" (Expand search), "using coating python python programming" (Expand search), "using cooking python python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder computational model concurrent program\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( coder computational model concurrent program ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder computational model concurrent program") OR ("using coding python python programming"))*.