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