Perhaps you should try some spelling variations:
"coder coder network control problems" » "coder coder network control program" (Expand search), "coder coder networked control problems" (Expand search), "coder coded network control problems" (Expand search), "coder cooler network control problems" (Expand search), "coder modern network control problems" (Expand search), "coder decoder network control problems" (Expand search), "code code network control problems" (Expand search), "decoder codec network control 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.

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