Perhaps you should try some spelling variations:
"coder coder coupling between tree" » "coder mode coupling between tree" (Expand search), "coder model coupling between tree" (Expand search), "coder core coupling between tree" (Expand search), "coder coder coupling between three" (Expand search), "coder coder coupling between tax" (Expand search), "coder decoder coupling between tree" (Expand search), "code code coupling between tree" (Expand search), "decoder codec coupling between tree" (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), "rpa python 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 coupling between tree") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder coupling between tree\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder coupling between tree ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder coupling between tree") OR ("api python python python programming"))*.