Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
phong cong » phong chong, thong cong, phong dong
chong cong » cong cong, thong cong, cuong cong
hieu lang » chieu sang, hieu quang, nhieu tang
tuong cua » truong cua, huong cua, thong cua
nhanh cau » nhanh cay, thanh chau, nhanh ha
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 cua ((phong cong) OR (chong cong)) tan ((nhanh cau) OR (phan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - thanh tuong cua ((phong cong) OR (chong cong)) tan ((nhanh cau) or (phan cau))~".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh tuong cua ((phong cong) OR (chong cong)) tan ((nhanh cau) or (phan cau))*.