Perhaps you should try some spelling variations:
"coder coder processing reference model" » "coder coder processing preference model" (Expand search), "coder coder processing coreference model" (Expand search), "coder coder processing conference model" (Expand search), "coder cider processing reference model" (Expand search), "coder powder processing reference model" (Expand search), "coder power processing reference model" (Expand search), "coder decoder processing reference model" (Expand search), "code code processing reference model" (Expand search), "decoder codec processing reference model" (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 coder processing reference model") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder processing reference model\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder processing reference model ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder processing reference model") OR ("api python python python programming"))*.