Perhaps you should try some spelling variations:
"thanh hai de snippets" » "thanh phan de snippets", "thanh hoa de snippets", "thanh san de snippets", "thanh dai de snippets", "thanh lai de snippets", "thanh hai di 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: (((("thanh hai de snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thanh hai de snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thanh hai de snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thanh hai de snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.