Perhaps you should try some spelling variations:
"coder decoder bar source problem" » "coder decoder bar source problems" (Expand search), "encoder decoder bar source problem" (Expand search), "video decoder bar source problem" (Expand search), "coder decoder ba source problem" (Expand search), "coder decoder barra source problem" (Expand search), "coder decoder far sources problem" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api 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 bar source problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder decoder bar source problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder decoder bar source problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder decoder bar source problem") OR ("api python python python programming"))*.