Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
hien xanh » hien hanh, hien nhanh, chieu xanh
hang cong » dang cong, hang nong, bang cong
cua hang » cua dang, cua nhung, cua cong
cong dan » cong san, cong tan, huong dan
khan cap » than cap, khoan cam, phan cac
khan ap » han ap, khan dam

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 hien xanh - ((canh tranh) OR (hanh trinh)) cua hang cong dan ((khan cap) OR (khan ap))~.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((canh tranh) or (hanh trinh)) cua hang cong dan ((khan cap) or (khan ap))*.