Perhaps you should try some spelling variations:
"coder coder teaching scheduling problem" » "coder coder machine scheduling problem" (Expand search), "coder coder teaching schedule problem" (Expand search), "coder coder stealing scheduling problem" (Expand search), "coder code teaching scheduling problem" (Expand search), "coder poder teaching scheduling problem" (Expand search), "coder model teaching scheduling problem" (Expand search), "coder decoder teaching scheduling problem" (Expand search), "code code teaching scheduling problem" (Expand search), "decoder codec teaching 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 teaching scheduling problem") OR ("and python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder teaching scheduling problem\") OR (\"and python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder teaching scheduling problem ) OR ( and python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder teaching scheduling problem") OR ("and python python python programming"))*.