Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh huong, thanh cuong
thanh tung » thanh cong
phong cong » phong chong, thong cong, chong cong
hieu lang » chieu sang, hieu quang, nhieu tang
cua phong » cua phuong, cua khong, cuu phong
nhanh cau » nhanh cay, thanh chau, nhanh ha
cong dan » cong san, cong tan, huong dan
phan cau » phan dau, phan cac, phan tu
ho hieu » ho chieu, hoi hieu, nho hieu

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: ho hieu lang - ((thanh tuong) OR (thanh tung)) cua phong cong dan ((nhanh cau) OR (phan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - ((thanh tuong) OR (thanh tung)) cua phong cong dan ((nhanh cau) or (phan cau))~".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((thanh tuong) OR (thanh tung)) cua phong cong dan ((nhanh cau) or (phan cau))*.