Perhaps you should try some spelling variations:
"coder coder tasks packing problem" » "coder coder tasks planning problem" (Expand search), "coder coder based packing problem" (Expand search), "coder coder disk packing problem" (Expand search), "coder decoder tasks packing problem" (Expand search), "code code tasks packing problem" (Expand search), "decoder codec tasks packing problem" (Expand search), "coder coded masks packing problem" (Expand search), "coder worker tasks 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.

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