Perhaps you should try some spelling variations:
"using computational in clustering problem" » "and computational in clustering problem" (Expand search), "using computational in covering problem" (Expand search), "using computational and clustering problem" (Expand search), "using computational _ clustering problem" (Expand search), "using computational 3d clustering problem" (Expand search), "using computational on clustering problem" (Expand search), "using computational spin clustering problem" (Expand search)
"using combination in coding program" » "business combination in coding program" (Expand search), "drug combination in coding program" (Expand search), "and combination in coding program" (Expand search), "using combination of coding program" (Expand search), "using combination with coding program" (Expand search), "using combination in cloning program" (Expand search), "using combination in loading program" (Expand search), "using combination in cooling programs" (Expand search), "using combination on coding program" (Expand search), "using combination in decoding program" (Expand search), "using combination non coding program" (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 in clustering problem\") OR (\"using combination in coding program\"))~".
• Removing quotes may allow a broader search: (( using computational in clustering problem ) OR ( using combination in coding program ))~.
• Adding a wildcard symbol may retrieve word variants: (("using computational in clustering problem") OR ("using combination in coding program"))*.