Perhaps you should try some spelling variations:
"coder precoder delay constrained programming" » "coder precoder delay constraint programming" (Expand search), "coder precoder energy constrained programming" (Expand search), "coder precoder degree constrained programming" (Expand search), "coder precoder solve constrained programming" (Expand search), "coder decoder delay constrained programming" (Expand search), "coder precoded relay constrained 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 precoder delay constrained programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoder delay constrained programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder precoder delay constrained programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder precoder delay constrained programming") OR ("api python python python programming"))*.