Perhaps you should try some spelling variations:
"coder coder main challenges of" » "coder coder main challenges and" (Expand search), "coder decoder main challenges of" (Expand search), "code code main challenges of" (Expand search), "decoder codec main challenges of" (Expand search), "coder soder maicon challenges of" (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 main challenges of\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder main challenges of ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder main challenges of") OR ("api python python python programming"))*.