Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh thi » tranh thai, tran thi, trinh thi
hanh cong » hang cong, hanh dong, nhanh chong
tac gian » tac gia, tac giai, tac giam
gian cau » gian chau, gian cac, gian cam

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: ho ((hieu manh) OR (chieu sach)) - canh tranh thi ((hanh cong) OR (thanh cong)) tac gian cau~.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sach)) - canh tranh thi ((hanh cong) or (thanh cong)) tac gian cau*.