Perhaps you should try some spelling variations:
thanh tung » thanh cong
thong lanh » tuong lanh, thong thanh, thuong lang
thong danh » thong dan, trong danh, thong thanh
hoi hieu » hoi phieu, hoi tieu, moi hieu
va thong » va thuong, va phuong, he thong
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
tung va » trung va, tuong va, dung va

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: hoi hieu qua - thanh tung va thong ((thong lanh) OR (thong danh)) ((toan cau) OR (toan tap))~.
• Adding a wildcard symbol may retrieve word variants: hoi hieu qua - thanh tung va thong ((thong lanh) or (thong danh)) ((toan cau) or (toan tap))*.