Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hien nhanh » hien hanh, tien thanh, dien thanh
canh doanh » hanh doanh, chinh doanh, doanh doanh
doanh cua » doanh luan
dang cong » dung cong
dan giang » van giang, manh giang, tran giang
cua dang » cua cong, cua ban

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 (thien thanh)) - canh doanh cua dang cong ((dan gian) or (dan giang)) lan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (thien thanh)) - canh doanh cua dang cong ((dan gian) OR (dan giang)) lan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) OR (thien thanh)) - canh doanh cua dang cong ((dan gian) or (dan giang)) lan".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) OR (thien thanh)) - canh doanh cua dang cong ((dan gian) or (dan giang)) lan*.