Perhaps you should try some spelling variations:
"tran cuong va slippers" » "tan cuong va slippers", "tran cong va slippers", "tran tuong va slippers", "tran luong va slippers", "tran duong va slippers", "tran cuong va slippery", "tran cuong va grippers"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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: "((((\"tran cuong va slippers\") OR (\"dung java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( tran cuong va slippers ) OR ( dung java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("tran cuong va slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets"))*.