Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong le toan snippets" » "cuong le toan snippets", "cong li toan snippets", "hong le toan snippets", "cong ke toan snippets", "cong le doan snippets", "cong le tuan 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 java java snippets") or ("cong le toan snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("cong le toan snippets"))) OR ("locating bug code snippets"))*.
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( cong le toan snippets ))) or ( locating bug code snippets ))*.