Perhaps you should try some spelling variations:
"coder precoder time nonlinear programming" » "coder precoder time linear programming" (Expand search), "coder decoder time nonlinear programming" (Expand search), "coder precoder the nonlinear programming" (Expand search), "coder recovery time nonlinear programming" (Expand search), "coder proper time nonlinear programming" (Expand search), "coder precoded mimo nonlinear programming" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ 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 precoder time nonlinear programming") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoder time nonlinear programming\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder precoder time nonlinear programming ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder precoder time nonlinear programming") OR ("_ python python python programming"))*.