Perhaps you should try some spelling variations:
"trinh dan de snippets" » "trinh han de snippets", "trinh van de snippets", "trinh san de snippets", "trinh dan den snippets", "trinh dang de snippets"
"dung cua data snippets" » "dung luan data snippets", "dung cho data snippets", "dung cua dang snippets", "dung cua dan snippets", "dung a data 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: (((("trinh dan de snippets") or ("dung cua data snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh dan de snippets") OR ("dung cua data snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh dan de snippets ) or ( dung cua data snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh dan de snippets") or ("dung cua data snippets"))) or ("locating bug code snippets"))*.