Perhaps you should try some spelling variations:
"dung tin cuong snippets" » "dung tien cuong snippets", "dung tinh cuong snippets", "dung tan cuong snippets", "dong tin cuong snippets", "luong tin cuong snippets", "dung tren cuong snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "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 tin cuong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung tin cuong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tin cuong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tin cuong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.