Perhaps you should try some spelling variations:
"variable functions and housing projects" » "covariance functions and housing projects" (Expand search), "variation functions and housing projects" (Expand search), "measurable functions and housing projects" (Expand search), "variable function and housing projects" (Expand search), "variable functional and housing projects" (Expand search)
"advanced oxidation coding decoding program" » "advanced oxidation coating decoding program" (Expand search), "advanced oxidation coatings decoding program" (Expand search), "advanced oxidation probing decoding program" (Expand search), "advanced oxidation coding welcoming program" (Expand search), "advanced oxidation coding deworming program" (Expand search), "advanced oxidation coding feeding program" (Expand search), "advanced oxidation encoding decoding program" (Expand search), "advanced oxidation reading decoding program" (Expand search), "advanced oxidation joint decoding 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: "((\"variable functions and housing projects\") OR (\"advanced oxidation coding decoding program\"))~".
• Removing quotes may allow a broader search: (( variable functions and housing projects ) OR ( advanced oxidation coding decoding program ))~.
• Adding a wildcard symbol may retrieve word variants: (("variable functions and housing projects") OR ("advanced oxidation coding decoding program"))*.