Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
thanh tung » thanh cong
dung cong » dung trong
cong lang » cong vang, cong luong, cong quang
lang hang » lang thang, hang hang, nang hang
hang tai » hang va, dung 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 - ((thanh trung) or (thanh tung)) va dung cong lang hang tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - ((thanh trung) OR (thanh tung)) va dung cong lang hang tai.
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - ((thanh trung) or (thanh tung)) va dung cong lang hang tai*.