Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
trung toan » truong toan, trung tuan, trung tran
thong cong » trong cong, tong cong, thong thong
hieu xanh » chieu xanh, hieu manh, hieu nganh
hieu lang » chieu sang, hieu quang, nhieu tang
cong anh » cong danh, dong anh, hong anh
tuan ban » tuan bang, luan ban, quang ban
toan ban » van ban

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: doc ((hieu xanh) OR (hieu lang)) - hanh trung toan thong cong anh ((tuan ban) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hieu lang)) - hanh trung toan thong cong anh ((tuan ban) or (toan ban))*.