Perhaps you should try some spelling variations:
"advanced oxidation and computation program" » "advanced oxidation and computational program" (Expand search), "advanced oxidation and computational programs" (Expand search), "advanced oxidation and compensation program" (Expand search), "advanced oxidation of computation program" (Expand search)
"advanced modulation code computer program" » "advanced calculation code computer program" (Expand search), "advanced modulation codes computer program" (Expand search), "advanced modulation model computer program" (Expand search), "advanced modulation doped computer program" (Expand search), "advanced modulation node computer program" (Expand search), "advanced modulation one computer program" (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced oxidation and computation program\") OR (\"advanced modulation code computer program\"))~".
• Removing quotes may allow a broader search: (( advanced oxidation and computation program ) OR ( advanced modulation code computer program ))~.
• Adding a wildcard symbol may retrieve word variants: (("advanced oxidation and computation program") OR ("advanced modulation code computer program"))*.