Perhaps you should try some spelling variations:
"surface modifications from python programming" » "surface modification from python programming" (Expand search), "surface notifications from python programming" (Expand search), "surface fortifications from python programming" (Expand search), "surface modifications from pathogen programming" (Expand search), "surface modifications from anthony programming" (Expand search)
"_ convolutional coding using program" » "_ convolutional codes using program" (Expand search), "_ convolutional code using program" (Expand search), "_ convolutional long using program" (Expand search), "_ convolutional coding housing program" (Expand search), "_ convolutional coding nursing program" (Expand search), "_ convolutional coding aging program" (Expand search), "_ convolutional loading using program" (Expand search), "_ convolutional modeling using program" (Expand search), "_ convolutional drying using 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: "((\"_ convolutional coding using program\") OR (\"surface modifications from python programming\"))~".
• Removing quotes may allow a broader search: (( _ convolutional coding using program ) OR ( surface modifications from python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("_ convolutional coding using program") OR ("surface modifications from python programming"))*.