Perhaps you should try some spelling variations:
"dung doanh co snippets" » "dung dan co snippets", "dung dong co snippets", "dung doanh cua snippets", "dung doanh va snippets", "dung anh co snippets"
"dan trinh java snippets" » "dan tinh java snippets", "van trinh java snippets", "hanh trinh java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dan trinh java snippets") or ("dung doanh co snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan trinh java snippets") OR ("dung doanh co snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan trinh java snippets ) or ( dung doanh co snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan trinh java snippets") or ("dung doanh co snippets"))) or ("locating bug code snippets"))*.