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