Perhaps you should try some spelling variations:
"coder coder sequential sample problem" » "coder coder sequential sampling problem" (Expand search), "coder coder sequencial sampling problem" (Expand search), "coder coder sequential symbol problem" (Expand search), "coder order sequential sample problem" (Expand search), "coder under sequential sample problem" (Expand search), "coder does sequential sample problem" (Expand search), "coder coder sequential complex problem" (Expand search), "coder decoder sequential sample problem" (Expand search), "code code sequential sample problem" (Expand search), "decoder codec sequential sample 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 sequential sample problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder sequential sample problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder sequential sample problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder sequential sample problem") OR ("api python python python programming"))*.