Perhaps you should try some spelling variations:
"coder coder weighted arithmetic problems" » "coder coder weighted aritmetica problemas" (Expand search), "coder node weighted arithmetic problems" (Expand search), "coder over weighted arithmetic problems" (Expand search), "coder under weighted arithmetic problems" (Expand search), "coder decoder weighted arithmetic problems" (Expand search), "code code weighted arithmetic problems" (Expand search), "decoder codec weighted arithmetic 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 weighted arithmetic problems") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder weighted arithmetic problems\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder weighted arithmetic problems ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder weighted arithmetic problems") OR ("api python python python programming"))*.