Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
tien thanh » tien thinh, tran thanh, den thanh
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong van » cong vang, cong san, song van
van tan » van tuan, van ban, van tai
tan tap » toan tap, han tap, tan tat

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (tien thanh)) - canh tranh cua nhung cong van tan tap~.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (tien thanh)) - canh tranh cua nhung cong van tan tap*.