Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
chieu sang » chieu sach, chieu xanh, hieu lang
cong cong » cong dong, trong cong, dung cong
hanh san » thanh san, khach san, thanh son
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu
san tai » sang tai, van tai, han tai

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 sang)) - hanh san tai cong cong dan phan cau~.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien hach) or (chieu sang)) - hanh san tai cong cong dan phan cau*.