Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
cong khanh » cong thanh, cong khan, cong nhan
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
luan cong » luat cong, luong cong, luan chung
cong cong » cong dong, trong cong, dung cong
khanh tai » thanh tai, hanh tai, nhanh thai
tai ban » tai san, tai ngan, tai benh

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 tang) or (hanh mang)) luan cong cong khanh tai ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - ((hanh tang) OR (hanh mang)) luan cong cong khanh tai ban*.