Perhaps you should try some spelling variations:
"dung doanh code snippets" » "dung dan code snippets", "dung dong code snippets", "dung doanh co snippets"
"trinh cuu de snippets" » "trinh cau de snippets", "trinh cua de snippets", "trinh chu de snippets", "trinh cuu ve snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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 cuu de snippets") or ("dung doanh code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh cuu de snippets") OR ("dung doanh code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh cuu de snippets ) or ( dung doanh code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh cuu de snippets") or ("dung doanh code snippets"))) or ("locating bug code snippets"))*.