Perhaps you should try some spelling variations:
"advanced simulation in computer program" » "advanced modulation in computer program" (Expand search), "advanced calculation in computer program" (Expand search), "advanced simulation and computer program" (Expand search), "advanced simulation _ computer program" (Expand search)
"advanced simulation from combat program" » "advanced modulation from combat program" (Expand search), "advanced calculation from combat program" (Expand search), "advanced simulation from pcmat program" (Expand search), "advanced simulation from combat gram" (Expand search), "advanced simulation from meat program" (Expand search), "advanced simulation from compact program" (Expand search), "advanced simulation from compost program" (Expand search), "advanced simulation from coimbra program" (Expand search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("advanced simulation in computer program") OR ("advanced simulation from combat program"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced simulation in computer program\") OR (\"advanced simulation from combat program\"))".
• Removing quotes may allow a broader search: (( advanced simulation in computer program ) OR ( advanced simulation from combat program )).
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