Perhaps you should try some spelling variations:
"coder coder challenges wsn programming" » "coder modern challenges wsn programming" (Expand search), "coder mode challenges wsn programming" (Expand search), "coder borders challenges wsn programming" (Expand search), "coder coder challenges in programming" (Expand search), "coder coder challenges on programming" (Expand search), "coder coder challenges cone programming" (Expand search), "coder coder challenges when programming" (Expand search), "coder decoder challenges wsn programming" (Expand search), "code code challenges wsn programming" (Expand search), "decoder codec challenges wsn programming" (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)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder coder challenges wsn programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder challenges wsn programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder challenges wsn programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder challenges wsn programming") OR ("api python python python programming"))*.