Perhaps you should try some spelling variations:
"and functionality and calling program" » "and functional and calling program" (Expand search), "and functionality of calling program" (Expand search), "and functionality and culling program" (Expand search), "and functionality and walking program" (Expand search), "and functionality and labeling program" (Expand search), "and functionality and calving program" (Expand search), "and functionality and falling program" (Expand search), "and functionality and galling program" (Expand search)
"advanced metering coding decoding program" » "advanced materials coding decoding program" (Expand search), "advanced maternal coding decoding program" (Expand search), "advanced metering coding welcoming program" (Expand search), "advanced metering coding deworming program" (Expand search), "advanced metering coding feeding program" (Expand search), "advanced material coding decoding program" (Expand search), "advanced metering encoding decoding program" (Expand search), "advanced metering reading decoding program" (Expand search), "advanced metering joint decoding program" (Expand search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"and functionality and calling program\") OR (\"advanced metering coding decoding program\"))~".
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