Perhaps you should try some spelling variations:
"coder coder dft calculations problems" » "coder coder dft calculation problem" (Expand search), "coder coder dft calibration problems" (Expand search), "coder coder dft calculation process" (Expand search), "coder decoder dft calculations problems" (Expand search), "code code dft calculations problems" (Expand search), "decoder codec dft calculations problems" (Expand search), "coder code df calculations problems" (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), "rpa python python python programming" (Expand search), "manim python python python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder dft calculations problems\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder dft calculations problems ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder dft calculations problems") OR ("api python python python programming"))*.