Perhaps you should try some spelling variations:
"coder decoder string theory programming" » "coder decoder string the programming" (Expand search), "coder decoder string the reprogramming" (Expand search), "coder decoder string their reprogramming" (Expand search), "coder decoder using theory programming" (Expand search), "encoder decoder string theory programming" (Expand search), "coder decoder nursing theory programming" (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 decoder string theory programming") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder decoder string theory programming\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder decoder string theory programming ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder decoder string theory programming") OR ("_ python python python programming"))*.