Perhaps you should try some spelling variations:
"variance optimization using array program" » "surface optimization using array program" (Expand search), "engine optimization using array program" (Expand search), "value optimization using array program" (Expand search), "variance optimization and array program" (Expand search), "variance optimization using spray program" (Expand search), "variance optimization using ray program" (Expand search), "variance optimization using warranty program" (Expand search), "variance optimization ring array program" (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("variance optimization using array program") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"variance optimization using array program\") OR (\"using coding python python programming\"))".
• Removing quotes may allow a broader search: (( variance optimization using array program ) OR ( using coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("variance optimization using array program") OR ("using coding python python programming"))*.