Perhaps you should try some spelling variations:
"coder coder tese open problems" » "coder coder tese on problems" (Expand search), "coder decoder tese open problems" (Expand search), "code code tese open problems" (Expand search), "decoder codec tese open problems" (Expand search), "coder coder dense open problems" (Expand search), "coder coder the open 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder coder tese open problems") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder tese open problems\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder tese open problems ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder tese open problems") OR ("api python python python programming"))*.