Perhaps you should try some spelling variations:
thien thanh » thi thanh, hien hanh, chien tranh
tien thanh » tien thinh, tran thanh, den thanh
thanh tung » thanh cong
tien manh » tien anh, tieng anh, tran manh
dung cong » dung trong
tung cua » trung cua, tuong cua, dung cua
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tan, tran tuan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((tien manh) OR (tien thanh))) or (thien thanh)) - thanh tung cua dung cong tan tran tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((tien manh) OR (tien thanh))) OR (thien thanh)) - thanh tung cua dung cong tan tran tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((tien manh) OR (tien thanh))) or (thien thanh)) - thanh tung cua dung cong tan tran tap*".