Perhaps you should try some spelling variations:
"tran trinh java snippets" » "trang trinh java snippets", "tra trinh java snippets", "thanh trinh java snippets"
"dung cau de snippets" » "dung chau de snippets", "dung cu de snippets", "dung cac de snippets", "dung cau den snippets", "dung cau do snippets", "dung cuu de 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: (((("tran trinh java snippets") or ("dung cau de snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran trinh java snippets") OR ("dung cau de snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran trinh java snippets ) or ( dung cau de snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran trinh java snippets") or ("dung cau de snippets"))) or ("locating bug code snippets"))*.