Perhaps you should try some spelling variations:
"coder decoder knowing arduino programming" » "coder decoder knowing arduino programmable" (Expand search), "coder decoder knowing radio programming" (Expand search), "coder decoder knowing learning programming" (Expand search), "coder disorders knowing arduino programming" (Expand search), "encoder decoder knowing arduino programming" (Expand search), "video decoder knowing arduino programming" (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 knowing arduino programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder decoder knowing arduino programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder decoder knowing arduino programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder decoder knowing arduino programming") OR ("api python python python programming"))*.