Perhaps you should try some spelling variations:
"using clustering in coverage problem" » "and clustering in coverage problem" (Expand search), "means clustering in coverage problem" (Expand search), "using clustering in covering problem" (Expand search), "using clustering in covering problems" (Expand search), "using clustering in coverage from" (Expand search), "using clustering and coverage problem" (Expand search), "using clustering of coverage problem" (Expand search), "using clustering _ coverage 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 clustering in coverage problem\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( using clustering in coverage problem ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("using clustering in coverage problem") OR ("using coding python python programming"))*.