Perhaps you should try some spelling variations:
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
cong cong » cong dong, trong cong, dung cong
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
cong san » cong tac
chay cho » cay cho, chan cho, chay cao
chat cho » chat co, chat thom, cap cho

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) OR (hien hanh)) - anh tang cua cong cong san ((chay cho) OR (chat cho))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien hanh)) - anh tang cua cong cong san ((chay cho) OR (chat cho))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - anh tang cua cong cong san ((chay cho) OR (chat cho))*.