Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh trung » thanh trung, hanh trang, manh trung
trung cua » truong cua, trung tuan, trung cap
nhung don » nhung van, nhung bo
dung cong » dung trong
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, 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 nhanh - hanh trung cua ((nhung don) or (dung cong)) dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - hanh trung cua ((nhung don) OR (dung cong)) dan than cao.
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - hanh trung cua ((nhung don) or (dung cong)) dan than cao*.