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