Perhaps you should try some spelling variations:
"coder coding using propagation models" » "coder coding using propagation model" (Expand search), "coder coding cutting propagation models" (Expand search), "coder coding single propagation models" (Expand search), "coder coding in propagation models" (Expand search), "modern coding using propagation models" (Expand search), "color coding using propagation models" (Expand search), "odor coding using propagation models" (Expand search), "coder loading using propagation models" (Expand search), "coder modeling using propagation models" (Expand search), "coder drying using propagation models" (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 coding using propagation models") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coding using propagation models\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coding using propagation models ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coding using propagation models") OR ("api python python python programming"))*.