Perhaps you should try some spelling variations:
"using computational methods clustering problem" » "using computational model clustering problem" (Expand search), "and computational methods clustering problem" (Expand search), "using computational medoids clustering problem" (Expand search), "using computational methods cluster problem" (Expand search), "using computational networks clustering problem" (Expand search), "using computational methods covering problem" (Expand search)
"using using python python programming" » "using using pythons python programming" (Expand search), "using using piton python programming" (Expand search), "using using pitons python programming" (Expand search), "using usando python python programming" (Expand search), "using in python python programming" (Expand search), "using fusing python python programming" (Expand search), "housing using python python programming" (Expand search), "nursing using 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 computational methods clustering problem\") OR (\"using using python python programming\"))~".
• Removing quotes may allow a broader search: (( using computational methods clustering problem ) OR ( using using python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("using computational methods clustering problem") OR ("using using python python programming"))*.