Perhaps you should try some spelling variations:
"coder coder using propagation model" » "coder coder cutting propagation model" (Expand search), "coder coder single propagation model" (Expand search), "coder coder in propagation model" (Expand search), "coder coder using propagation of" (Expand search), "coder decoder using propagation model" (Expand search), "code code using propagation model" (Expand search), "decoder codec using propagation model" (Expand search), "coder coders using propagation model" (Expand search), "coder cover using propagation model" (Expand search), "coder code 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 coder using propagation model\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder using propagation model ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder using propagation model") OR ("api python python python programming"))*.