Perhaps you should try some spelling variations:
"advanced duplication and computer program" » "advanced application and computer program" (Expand search), "advanced applications and computer program" (Expand search), "advanced glication and computer program" (Expand search), "advanced replication and computer program" (Expand search), "advanced duplication in computer program" (Expand search), "advanced duplication _ computer program" (Expand search)
"using computational and computation program" » "and computational and computation program" (Expand search), "using computational and computational program" (Expand search), "using computational and computational programs" (Expand search), "using computational and compensation program" (Expand search), "using computational fluid computation program" (Expand search), "using computational of computation 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 and computation program\") OR (\"advanced duplication and computer program\"))~".
• Removing quotes may allow a broader search: (( using computational and computation program ) OR ( advanced duplication and computer program ))~.
• Adding a wildcard symbol may retrieve word variants: (("using computational and computation program") OR ("advanced duplication and computer program"))*.