Perhaps you should try some spelling variations:
"and computational data clustering problem" » "and computational and clustering problem" (Expand search), "and compositional data clustering problem" (Expand search), "and computational art clustering problem" (Expand search), "and computational data covering problem" (Expand search), "_ computational data clustering problem" (Expand search)
"using computation and coding program" » "using computational and coding program" (Expand search), "using imputation and coding program" (Expand search), "using compilation and coding program" (Expand search), "using computation of coding program" (Expand search), "using computation and cloning program" (Expand search), "using computation and loading program" (Expand search), "using computation and cooling programs" (Expand search), "using computation and coping program" (Expand search), "using computation and cooling program" (Expand search), "using computation and cooking program" (Expand search)

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