Perhaps you should try some spelling variations:
"coder coder theory teaching problems" » "coder coder theory teaching problem" (Expand search), "coder coder theory teaching process" (Expand search), "coder coder theory packing problems" (Expand search), "coder coder history teaching problems" (Expand search), "coder code theory teaching problems" (Expand search), "coder codes theory teaching problems" (Expand search), "coder modern theory teaching problems" (Expand search), "coder decoder theory teaching problems" (Expand search), "code code theory teaching problems" (Expand search), "decoder codec theory teaching 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)

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