Perhaps you should try some spelling variations:
"variance optimization _ python programming" » "surface optimization _ python programming" (Expand search), "engine optimization _ python programming" (Expand search), "value optimization _ python programming" (Expand search)
"deep convolutional coding coding program" » "deep convolutional codes coding program" (Expand search), "deep convolutional code coding program" (Expand search), "deep convolutional long coding program" (Expand search), "deep convolutional coding cloning program" (Expand search), "deep convolutional coding loading program" (Expand search), "deep convolutional coding cooling programs" (Expand search), "deep convolutional coding decoding program" (Expand search), "deep convolutional coding using program" (Expand search), "deep convolutional coding canine 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: "((\"deep convolutional coding coding program\") OR (\"variance optimization _ python programming\"))~".
• Removing quotes may allow a broader search: (( deep convolutional coding coding program ) OR ( variance optimization _ python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("deep convolutional coding coding program") OR ("variance optimization _ python programming"))*.