Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
cong thanh » dong thanh, cong trinh, cong tan
theo dat » theo dau, theo luat, tren dat
dat sach » mat sach, dat khach, nam sach
van dang » van dong, van dung, van nang
tran cau » tran chau, toan cau, ran cau
va dang » va nang, va lang, da dang

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: theo dat sach - canh tranh ((van dang) OR (va dang)) cong thanh tran cau~.
• Adding a wildcard symbol may retrieve word variants: theo dat sach - canh tranh ((van dang) or (va dang)) cong thanh tran cau*.