Perhaps you should try some spelling variations:
"coder coder time allocation problem" » "coder coder time location problem" (Expand search), "coder coder the allocation problem" (Expand search), "coder coder optimal allocation problem" (Expand search), "coder coder time applications problem" (Expand search), "coder decoder time allocation problem" (Expand search), "code code time allocation problem" (Expand search), "decoder codec time allocation problem" (Expand search), "coder cover time allocation problem" (Expand search), "coder modern time allocation problem" (Expand search), "coder over time allocation problem" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons 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 time allocation problem\") OR (\"_ python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder time allocation problem ) OR ( _ python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder time allocation problem") OR ("_ python python python programming"))*.