Perhaps you should try some spelling variations:
"coder coding and scheduling problems" » "coder coding and scheduling problem" (Expand search), "modern coding and scheduling problems" (Expand search), "color coding and scheduling problems" (Expand search), "odor coding and scheduling problems" (Expand search), "coder coding rna scheduling 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 coding and scheduling problems") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coding and scheduling problems\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coding and scheduling problems ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coding and scheduling problems") OR ("api python python python programming"))*.