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