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