Perhaps you should try some spelling variations:
"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)
"coder coder signal based program" » "coder coder signals based program" (Expand search), "coder coder sign based program" (Expand search), "coder coder signal and program" (Expand search), "coder mode signal based program" (Expand search), "coder power signal based program" (Expand search), "coder power signals based program" (Expand search), "coder decoder signal based program" (Expand search), "code code signal based program" (Expand search), "decoder codec signal based program" (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 coder signal based program") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder signal based program\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder signal based program ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder signal based program") OR ("api python python python programming"))*.