Perhaps you should try some spelling variations:
"coder coder of challenging problem" » "coder coder of charging problem" (Expand search), "coder coder of chattering problem" (Expand search), "coder coder of challenging proposal" (Expand search), "coder coder _ challenging problem" (Expand search), "coder coder in challenging problem" (Expand search), "coder coder the challenging problem" (Expand search), "coder decoder of challenging problem" (Expand search), "code code of challenging problem" (Expand search), "decoder codec of challenging problem" (Expand search), "coder code of challenging problem" (Expand search), "coder codes of challenging problem" (Expand search), "coder codex of challenging 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder of challenging problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder of challenging problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder of challenging problem") OR ("api python python python programming"))*.