Perhaps you should try some spelling variations:
"coder coder complex scheduling problem" » "coder coder boiler scheduling problem" (Expand search), "coder copper complex scheduling problem" (Expand search), "coder holder complex scheduling problem" (Expand search), "coder modern complex scheduling problem" (Expand search), "coder decoder complex scheduling problem" (Expand search), "code code complex scheduling problem" (Expand search), "decoder codec complex scheduling problem" (Expand search)
"and python python python programming" » "and pythons python python programming" (Expand search), "and piton python python programming" (Expand search), "and pitons python python programming" (Expand search), "in python python python programming" (Expand search), "on python python python programming" (Expand search), "api 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 complex scheduling problem") OR ("and python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder complex scheduling problem\") OR (\"and python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder complex scheduling problem ) OR ( and python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder complex scheduling problem") OR ("and python python python programming"))*.