Perhaps you should try some spelling variations:
"coder codemi source nonlinear programming" » "coder codemi source linear programming" (Expand search), "coder codemi some nonlinear programming" (Expand search), "coder codemi forced nonlinear programming" (Expand search), "coder codemi solve nonlinear programming" (Expand search), "coder comme source nonlinear programming" (Expand search), "code code source nonlinear 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 codemi source nonlinear programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder codemi source nonlinear programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder codemi source nonlinear programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder codemi source nonlinear programming") OR ("api python python python programming"))*.