Perhaps you should try some spelling variations:
"luan trinh java snippets" » "xuan trinh java snippets", "luan tinh java snippets", "luan tranh 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: (((("luan 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: (((("luan trinh java snippets") OR ("dung cau de snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan trinh java snippets ) or ( dung cau de snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan trinh java snippets") or ("dung cau de snippets"))) or ("locating bug code snippets"))*.