Perhaps you should try some spelling variations:
"coder coder concern convex programming" » "coder coder concern cone programming" (Expand search), "coder coder concern computer programming" (Expand search), "coder coder concave convex programming" (Expand search), "coder voters concern convex programming" (Expand search), "coder does concern convex programming" (Expand search), "coder code concept convex programming" (Expand search), "coder decoder concern convex programming" (Expand search), "code code concern convex programming" (Expand search), "decoder codec concern convex programming" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pitons 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 coder concern convex programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder concern convex programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder concern convex programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder concern convex programming") OR ("api python python python programming"))*.