Perhaps you should try some spelling variations:
"coder precoder using dynamic programming" » "coder precoder using genetic programming" (Expand search), "coder decoder using dynamic programming" (Expand search), "coder precoding using dynamic programming" (Expand search), "coder promoter using dynamic programming" (Expand search)
"api pitons python python programming" » "api pitons pythons python programming" (Expand search), "api pitons piton python programming" (Expand search), "api pitons pytm python programming" (Expand search), "api citons python python programming" (Expand search), "api pitoni python python programming" (Expand search), "api pitoes python python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder precoder using dynamic programming") OR ("api pitons python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoder using dynamic programming\") OR (\"api pitons python python programming\"))".
• Removing quotes may allow a broader search: (( coder precoder using dynamic programming ) OR ( api pitons python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder precoder using dynamic programming") OR ("api pitons python python programming"))*.