Perhaps you should try some spelling variations:
"network coding precoding _ programming" » "network coding decoding _ programming" (Expand search), "network forcing precoding _ programming" (Expand search), "network joint precoding _ programming" (Expand search)
"piton python piton python programming" » "pitons python pitons python programming" (Expand search), "in python in python programming" (Expand search), "with python with python programming" (Expand search), "piton python python python programming" (Expand search), "piton pythons python python programming" (Expand search), "piton python editor python programming" (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: "((\"network coding precoding _ programming\") OR (\"piton python piton python programming\"))~".
• Removing quotes may allow a broader search: (( network coding precoding _ programming ) OR ( piton python piton python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("network coding precoding _ programming") OR ("piton python piton python programming"))*.