Perhaps you should try some spelling variations:
"dung va java snippets" » "dung java java snippets", "dung va java slippers"
"tan van tao snippets" » "tran van tao snippets", "tang van tao snippets", "luan van tao snippets", "tan van thao snippets", "tan vang tao snippets", "tan van tai snippets", "tan van tao slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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 ("tan van tao snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung va java snippets") OR ("tan van tao snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung va java snippets ) or ( tan van tao snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung va java snippets") or ("tan van tao snippets"))) or ("locating bug code snippets"))*.