Perhaps you should try some spelling variations:
"coder coder sequence based problem" » "coder order sequence based problem" (Expand search), "coder under sequence based problem" (Expand search), "coder leader sequence based problem" (Expand search), "coder coder sequence and problem" (Expand search), "coder coder sequence based problems" (Expand search), "coder coder sequence based probe" (Expand search), "coder coder sequence posed problem" (Expand search), "coder decoder sequence based problem" (Expand search), "code code sequence based problem" (Expand search), "decoder codec sequence based 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)

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