Perhaps you should try some spelling variations:
"coder precoder speed microcontrollers programming" » "coder precoder based microcontrollers programming" (Expand search), "coder precoder msp430 microcontrollers programming" (Expand search), "coder precoder st microcontrollers programming" (Expand search), "coder decoder speed microcontrollers programming" (Expand search), "coder recovery speed microcontrollers 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 precoder speed microcontrollers programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoder speed microcontrollers programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder precoder speed microcontrollers programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder precoder speed microcontrollers programming") OR ("api python python python programming"))*.