Perhaps you should try some spelling variations:
"coder propagation model coding problem" » "mode propagation model coding problem" (Expand search), "model propagation model coding problem" (Expand search), "modes propagation model coding problem" (Expand search), "coder propagation of coding problem" (Expand search), "coder propagation model coding problems" (Expand search), "coder propagation model coping problem" (Expand search), "coder propagation model loading problem" (Expand search), "coder propagation modern coding problem" (Expand search), "coder propagation model cooling problem" (Expand search), "coder propagation novel coding problem" (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 propagation model coding problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder propagation model coding problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder propagation model coding problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder propagation model coding problem") OR ("api python python python programming"))*.