Perhaps you should try some spelling variations:
"advanced simulation by computer program" » "advanced calculation by computer program" (Expand search), "advanced stimulation by computer program" (Expand search), "advanced simulation _ computer program" (Expand search), "advanced simulation and computer program" (Expand search)
"advanced modulation in computational program" » "advanced calculation in computational program" (Expand search), "advanced oxidation in computational program" (Expand search), "advanced modulation and computational program" (Expand search), "advanced modulation _ computational program" (Expand search), "advanced modulation of computational 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: (("advanced simulation by computer program") OR ("advanced modulation in computational program"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced simulation by computer program\") OR (\"advanced modulation in computational program\"))".
• Removing quotes may allow a broader search: (( advanced simulation by computer program ) OR ( advanced modulation in computational program )).
• Adding a wildcard symbol may retrieve word variants: (("advanced simulation by computer program") OR ("advanced modulation in computational program"))*.