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