Perhaps you should try some spelling variations:
"coder coder time optimization problem" » "coder coder time optimization problems" (Expand search), "coder coder the optimization problem" (Expand search), "coder coder engine optimization problem" (Expand search), "coder coder shape optimization problem" (Expand search), "coder decoder time optimization problem" (Expand search), "code code time optimization problem" (Expand search), "decoder codec time optimization problem" (Expand search), "coder cover time optimization problem" (Expand search), "coder modern time optimization problem" (Expand search), "coder over time optimization 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 time optimization problem") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder time optimization problem\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder time optimization problem ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder time optimization problem") OR ("_ python python python programming"))*.