Perhaps you should try some spelling variations:
"coder allocation methods sampling problem" » "coder application methods sampling problem" (Expand search), "coder collocation method sampling problem" (Expand search), "coder ablation methods sampling problem" (Expand search), "power allocation methods sampling problem" (Expand search), "order allocation methods sampling problem" (Expand search), "over allocation methods sampling problem" (Expand search), "coder allocation methods comparing problem" (Expand search), "coder allocation methods applied problem" (Expand search), "coder allocation method sample problem" (Expand search), "coder allocation methods sampling problems" (Expand search), "coder allocation methods swamping problem" (Expand search), "coder allocation methods gambling problems" (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 allocation methods sampling problem\") OR (\"_ python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder allocation methods sampling problem ) OR ( _ python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder allocation methods sampling problem") OR ("_ python python python programming"))*.