Perhaps you should try some spelling variations:
"coder and complexity theory problems" » "coder and complexity their problems" (Expand search), "coder and complexity therapy problems" (Expand search), "coder and complexity the problems" (Expand search), "code and complexity theory problems" (Expand search), "codes and complexity theory problems" (Expand search), "poder and complexity theory 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.

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