Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, dien thanh
tien thanh » tien thinh, tran thanh, den thanh
thanh tung » thanh cong
cong ngang » cong nhan, cong quang, cong lang
ngang nhan » hoang nhan, ngan han, bang nhan
dung cong » dung trong
nhan tai » hang tai, van tai, toan tai
va dung » van dung, va duong, vat dung

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 nhanh) or (tien thanh)) - ((thanh trung) or (thanh tung)) va dung cong ngang nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (tien thanh)) - ((thanh trung) OR (thanh tung)) va dung cong ngang nhan tai.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (tien thanh)) - ((thanh trung) or (thanh tung)) va dung cong ngang nhan tai*.