Perhaps you should try some spelling variations:
"advanced simulation from complex program" » "advanced calculation from complex program" (Expand search), "advanced simulation from simplex program" (Expand search), "advanced simulation from complex programmes" (Expand search), "advanced simulation from complex prograded" (Expand search)
"advanced modulation and loading program" » "advanced calculation and loading program" (Expand search), "advanced oxidation and loading program" (Expand search), "advanced modulation and reading program" (Expand search), "advanced modulation and breading program" (Expand search), "advanced modulation and reading programs" (Expand search), "advanced modulation in loading program" (Expand search), "advanced modulation of loading program" (Expand search), "advanced modulation and leading program" (Expand search), "advanced modulation and unloading program" (Expand search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced modulation and loading program\") OR (\"advanced simulation from complex program\"))~".
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