Perhaps you should try some spelling variations:
"based computational and computer program" » "and computational and computer program" (Expand search), "by computational and computer program" (Expand search), "based computational fluid computer program" (Expand search), "based computational _ computer program" (Expand search)
"advanced validation based loading program" » "advanced oxidation based loading program" (Expand search), "advanced glication based loading program" (Expand search), "advanced visualization based loading program" (Expand search), "advanced validation and loading program" (Expand search), "advanced validation by loading program" (Expand search), "advanced validity based loading program" (Expand search), "advanced validation based reading program" (Expand search), "advanced validation based breading program" (Expand search), "advanced validation based reading programs" (Expand search), "advanced validation based coding program" (Expand search), "advanced validation based trading 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: "((\"based computational and computer program\") OR (\"advanced validation based loading program\"))~".
• Removing quotes may allow a broader search: (( based computational and computer program ) OR ( advanced validation based loading program ))~.
• Adding a wildcard symbol may retrieve word variants: (("based computational and computer program") OR ("advanced validation based loading program"))*.