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