Perhaps you should try some spelling variations:
"coder code coding cost functions" » "coder code coding cost function" (Expand search), "coder code cloning cost functions" (Expand search), "coder code codigo cost functions" (Expand search), "coder code according cost functions" (Expand search), "coder code holding cost functions" (Expand search), "coder code costing cost functions" (Expand search), "coder code coding co functions" (Expand search), "code code coding cost functions" (Expand search), "modern code coding cost functions" (Expand search), "color code coding cost functions" (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 code coding cost functions") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder code coding cost functions\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder code coding cost functions ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder code coding cost functions") OR ("_ python python python programming"))*.