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), "rpa python python python programming" (Expand search)
"coder coder coding dft functionals" » "coder modern coding dft functionals" (Expand search), "coder color coding dft functionals" (Expand search), "coder odor coding dft functionals" (Expand search), "coder decoder coding dft functionals" (Expand search), "code code coding dft functionals" (Expand search), "decoder codec coding dft functionals" (Expand search), "coder coder coding data functionals" (Expand search), "coder coder coding of functionals" (Expand search), "coder coder coding dna functionals" (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 coding dft functionals") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder coding dft functionals\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder coding dft functionals ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder coding dft functionals") OR ("api python python python programming"))*.