Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java snippets"
"lan van kien snippets" » "lan van tien snippets", "lan van hien snippets", "lan van chien snippets", "luan van kien snippets", "lang van kien snippets", "tan van kien 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 java java snippets") or ("lan van kien snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("lan van kien snippets"))) OR ("locating bug core snippets"))*.
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( lan van kien snippets ))) or ( locating bug core snippets ))*.