Perhaps you should try some spelling variations:
"cong van dat snippets" » "cong vang dat snippets", "cong san dat snippets", "song van dat snippets", "cong van dao snippets", "cong van dau snippets", "cong dan dat snippets", "cong van dat slippers"
"dung va java snippets" » "dung java java snippets", "dung va java slippers"
"locating bug code snippets" » "locating bug code slippers", "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 va java snippets") or ("cong van dat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung va java snippets") OR ("cong van dat snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung va java snippets ) or ( cong van dat snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung va java snippets") or ("cong van dat snippets"))) or ("locating bug code snippets"))*.