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