Perhaps you should try some spelling variations:
"coder coder host allocation problem" » "coder coder host location problem" (Expand search), "coder coder cost allocation problem" (Expand search), "coder coder costs allocation problem" (Expand search), "coder decoder host allocation problem" (Expand search), "code code host allocation problem" (Expand search), "decoder codec host allocation problem" (Expand search), "coder model host 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder coder host allocation problem") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder host allocation problem\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder host allocation problem ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder host allocation problem") OR ("_ python python python programming"))*.