Perhaps you should try some spelling variations:
"coder coder string conic programming" » "coder coder string logic programming" (Expand search), "coder coder string cone programming" (Expand search), "coder coder string convex programming" (Expand search), "coder cordel string conic programming" (Expand search), "coder closed string conic programming" (Expand search), "coder modelo string conic programming" (Expand search), "coder coder using conic programming" (Expand search), "coder decoder string conic programming" (Expand search), "code code string conic programming" (Expand search), "decoder codec string conic programming" (Expand search)
"on python python python programming" » "on pythons python python programming" (Expand search), "on piton python python programming" (Expand search), "on pitons python python programming" (Expand search), "in python pythin python programming" (Expand search), "of python pythof python programming" (Expand search), "_ python pyth_ 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 coder string conic programming") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder string conic programming\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder string conic programming ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder string conic programming") OR ("on python python python programming"))*.