Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
chieu sach » chinh sach, chiet tach, chieu sang
khach san » khach hang, thanh san
dong cong » duong cong, dung cong, dang cong
hanh san » thanh san, thanh son, khanh son
tai dong » thai dong, tai cong, tai tong
cong san » cong tac
san phan » san pham, van phan, sat phan
phan cau » phan dau, phan cac, phan tu

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 ((thien hach) OR (chieu sach)) - ((hanh san) OR (khach san)) tai dong cong san phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien hach) or (chieu sach)) - ((hanh san) OR (khach san)) tai dong cong san phan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien hach) or (chieu sach)) - ((hanh san) OR (khach san)) tai dong cong san phan cau*.