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), "manim python python python programming" (Expand search)
"coder coder adding fixed effect" » "coder or adding fixed effect" (Expand search), "coder coder avoiding fixed effect" (Expand search), "coder coder mapping fixed effect" (Expand search), "coder coder using fixed effect" (Expand search), "coder coder adding fixed effects" (Expand search), "coder coder adding mixed effects" (Expand search), "coder decoder adding fixed effect" (Expand search), "code code adding fixed effect" (Expand search), "decoder codec adding fixed effect" (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 adding fixed effect") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder adding fixed effect\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder adding fixed effect ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder adding fixed effect") OR ("api python python python programming"))*.