Perhaps you should try some spelling variations:
"using computational and computer program" » "and computational and computer program" (Expand search), "using computational fluid computer program" (Expand search), "using computational _ computer program" (Expand search)
"advanced polymeric in computer program" » "advanced polymer in computer program" (Expand search), "advanced polymeric iron computer program" (Expand search), "advanced polymeric and computer program" (Expand search), "advanced polymeric mix computer program" (Expand search), "advanced polymeric _ computer program" (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: (("using computational and computer program") OR ("advanced polymeric in computer program"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computational and computer program\") OR (\"advanced polymeric in computer program\"))".
• Removing quotes may allow a broader search: (( using computational and computer program ) OR ( advanced polymeric in computer program )).
• Adding a wildcard symbol may retrieve word variants: (("using computational and computer program") OR ("advanced polymeric in computer program"))*.