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