Perhaps you should try some spelling variations:
"coder code using propagation model" » "coder code cutting propagation model" (Expand search), "coder code single propagation model" (Expand search), "coder code in propagation model" (Expand search), "coder code using propagation of" (Expand search), "code code using propagation model" (Expand search), "modern code using propagation model" (Expand search), "color code using propagation model" (Expand search), "coder made using propagation model" (Expand search), "coder coding using propagation 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)

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 code using propagation model\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder code using propagation model ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder code using propagation model") OR ("api python python python programming"))*.