Perhaps you should try some spelling variations:
"coder precoder combining linear programming" » "coder precoding combining linear programming" (Expand search), "coder procedure combining linear programming" (Expand search), "coder receiver combining linear programming" (Expand search), "coder precoder combining laser programming" (Expand search), "coder precoder combinacao linear programming" (Expand search), "coder precoder combinador linear programming" (Expand search), "coder decoder combining linear 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 combining linear programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoder combining linear programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder precoder combining linear programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder precoder combining linear programming") OR ("api python python python programming"))*.