Perhaps you should try some spelling variations:
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons python python programming" (Expand search)
"coder coder coded system proposal" » "coder coder coded systems proposal" (Expand search), "coder coder code system proposal" (Expand search), "coder coder closed system proposal" (Expand search), "coder decoder coded system proposal" (Expand search), "code code coded system proposal" (Expand search), "decoder codec coded system proposal" (Expand search), "coder color coded system proposal" (Expand search), "coder code code system proposal" (Expand search), "coder coder decoder system proposal" (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder coded system proposal\") OR (\"_ python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder coded system proposal ) OR ( _ python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder coded system proposal") OR ("_ python python python programming"))*.