Perhaps you should try some spelling variations:
"coder coder circle packing problem" » "coder coder circle planning problem" (Expand search), "coder coder particle packing problem" (Expand search), "coder colour circle packing problem" (Expand search), "coder closed circle packing problem" (Expand search), "coder inner circle packing problem" (Expand search), "coder decoder circle packing problem" (Expand search), "code code circle packing problem" (Expand search), "decoder codec circle packing problem" (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 circle packing problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder circle packing problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder circle packing problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder circle packing problem") OR ("api python python python programming"))*.