Perhaps you should try some spelling variations:
"coder coder decoder complex subject" » "coder coder encode complex subject" (Expand search), "coder coder deer complex subject" (Expand search), "coder coder deliver complex subject" (Expand search), "coder coder decoder complex project" (Expand search), "coder coder decoder complex objects" (Expand search), "coder encoder decoder complex subject" (Expand search), "code code decoder complex subject" (Expand search), "decoder codec decoder complex subject" (Expand search), "codesc poder decoder complex subject" (Expand search)
"on python python python programming" » "on pythons python python programming" (Expand search), "on piton python python programming" (Expand search), "on pitons python python programming" (Expand search), "in python pythin python programming" (Expand search), "of python pythof python programming" (Expand search), "_ python pyth_ 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 decoder complex subject") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder decoder complex subject\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder decoder complex subject ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder decoder complex subject") OR ("on python python python programming"))*.