Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"trong cao son snippets" » "truong cao son snippets", "trong cac son snippets", "trong ca son snippets", "trong cao cong 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 ("trong cao son snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("trong cao son snippets"))) OR ("locating bug code snippets"))*.
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( trong cao son snippets ))) or ( locating bug code snippets ))*.