Perhaps you should try some spelling variations:
"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)
"coder coder binary tree pre" » "coder cover binary tree pre" (Expand search), "coder over binary tree pre" (Expand search), "coder under binary tree pre" (Expand search), "coder decoder binary tree pre" (Expand search), "code code binary tree pre" (Expand search), "decoder codec binary tree pre" (Expand search), "coder coder biliary tree pre" (Expand search), "coder coder binary free pre" (Expand search), "coder coder binary tree pera" (Expand search), "coder coder binary tree tree" (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder binary tree pre\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder binary tree pre ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder binary tree pre") OR ("api python python python programming"))*.