Perhaps you should try some spelling variations:
"coder coder supervised clustering problem" » "coder coder supervised covering problem" (Expand search), "coder under supervised clustering problem" (Expand search), "coder court supervised clustering problem" (Expand search), "coder cbir supervised clustering problem" (Expand search), "coder decoder supervised clustering problem" (Expand search), "code code supervised clustering problem" (Expand search), "decoder codec supervised clustering problem" (Expand search)
"api pythons python python programming" » "api pitons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pythons piton python programming" (Expand search), "api pythons pitons python programming" (Expand search), "api pythons pytm python programming" (Expand search), "api python 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 supervised clustering problem") OR ("api pythons python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder supervised clustering problem\") OR (\"api pythons python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder supervised clustering problem ) OR ( api pythons python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder supervised clustering problem") OR ("api pythons python python programming"))*.