Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
nhung cong » dung cong, thong cong, hang cong
trung cua » truong cua, trung tuan, trung cap
mang cua » manh cua, dung cua, ban cua
san toan » van toan, manh toan, xuan toan
dan toan » van toan, dan than, manh toan

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 ((mang cua) or (trung cua)) nhung cong ((san toan) or (dan toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - hanh ((mang cua) OR (trung cua)) nhung cong ((san toan) OR (dan toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - hanh ((mang cua) or (trung cua)) nhung cong ((san toan) or (dan toan)) cau*.