Perhaps you should try some spelling variations:
"dung using java slippers" » "dung ung java slippers", "dung sinh java slippers", "dung uong java slippers", "dung using data slippers", "dung using java slippery", "dung using java grippers"
"dung cac nhan snippets" » "luong cac nhan snippets", "dung cho nhan snippets", "dung tai nhan snippets", "dung ca nhan snippets", "dung cac nha snippets", "dung cam nhan 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung using java slippers") or ("dung cac nhan snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung using java slippers") OR ("dung cac nhan snippets"))) OR ("locating bug code snippets"))*.
• Removing quotes may allow a broader search: (((( dung using java slippers ) or ( dung cac nhan snippets ))) or ( locating bug code snippets ))*.