Perhaps you should try some spelling variations:
"trinh dan tu snippets" » "trinh han tu snippets", "trinh van tu snippets", "trinh san tu snippets", "trinh danh tu snippets", "trinh dan su snippets", "trinh ban tu snippets"
"dung dung de snippets" » "duong dung de snippets", "ung dung de snippets", "dung ung de snippets", "dung dung he snippets", "dung dung dat 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 tu snippets") or ("dung dung de snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh dan tu snippets") OR ("dung dung de snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh dan tu snippets ) or ( dung dung de snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh dan tu snippets") or ("dung dung de snippets"))) or ("locating bug code snippets"))*.