Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"hung tran chap snippets" » "huong tran chap snippets", "quang tran chap snippets", "hung thang chap snippets", "hung tranh chap snippets", "hung tran chau snippets", "hung trang cham 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: "((((\"dung java java snippets\") OR (\"hung tran chap snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung java java snippets ) OR ( hung tran chap snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") OR ("hung tran chap snippets"))) OR ("locating bug code snippets"))*.