Perhaps you should try some spelling variations:
"using semantic based coverage problem" » "using semantic based covering problem" (Expand search), "using semantic based covering problems" (Expand search), "using semantic based coverage from" (Expand search), "using semantica baseada coverage problem" (Expand search), "using semantic and coverage problem" (Expand search), "using semantic based beverage problem" (Expand search), "using semantic based beverages problem" (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: "((\"using semantic based coverage problem\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( using semantic based coverage problem ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("using semantic based coverage problem") OR ("using coding python python programming"))*.