Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien xanh » hien hanh, hien nhanh, chieu xanh
van duong » van dong, van dung, van phong
vat dung » van dung, va dung, viet dung
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - thanh trung ((vat dung) or (van duong)) cong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh trung ((vat dung) OR (van duong)) cong tan than cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh trung ((vat dung) or (van duong)) cong tan than cau*.