Perhaps you should try some spelling variations:
"coder coating based functional model" » "coder coating and functional model" (Expand search), "coder coating based functional mri" (Expand search), "powder coating based functional model" (Expand search), "copper coating based functional model" (Expand search), "copper coatings based functional model" (Expand search), "coder coatings based functional 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), "rpa python python python programming" (Expand search), "manim 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 coating based functional model") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coating based functional model\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coating based functional model ) OR ( api python python python programming ))*.