Perhaps you should try some spelling variations:
"va trinh java snippets" » "van trinh java snippets", "va tinh java snippets", "lap trinh java snippets"
"cong cau de snippets" » "cong cu de snippets", "cong chuc de snippets", "thong cau de snippets", "cong cau den snippets", "cong cau do snippets", "cong 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: (((("va trinh java snippets") or ("cong cau de snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("va trinh java snippets") OR ("cong cau de snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( va trinh java snippets ) or ( cong cau de snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("va trinh java snippets") or ("cong cau de snippets"))) or ("locating bug code snippets"))*.