Perhaps you should try some spelling variations:
"advanced simulation _ constructing program" » "advanced simulation _ consulting program" (Expand search), "advanced simulation _ reconstruction program" (Expand search), "advanced simulation _ constructing ronda" (Expand search), "advanced calculation _ constructing program" (Expand search)
"advanced modulation grids computer program" » "advanced calculation grids computer program" (Expand search), "advanced oxidation grids computer program" (Expand search), "advanced population grids computer program" (Expand search), "advanced modulation rfid computer program" (Expand search), "advanced modulation is 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 _ constructing program") OR ("advanced modulation grids computer program"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced simulation _ constructing program\") OR (\"advanced modulation grids computer program\"))".
• Removing quotes may allow a broader search: (( advanced simulation _ constructing program ) OR ( advanced modulation grids computer program )).
• Adding a wildcard symbol may retrieve word variants: (("advanced simulation _ constructing program") OR ("advanced modulation grids computer program"))*.