Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
thanh chan » thanh phan, thanh nhan, thanh cha
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » truong cua, trung cap, dung cua
chan tu » phan tu, han tu, chon tu

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 ((thieu xanh) OR (hieu manh)) - thanh ((trung cua) OR (trung tuan)) nhung cong thanh chan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - thanh ((trung cua) or (trung tuan)) nhung cong thanh chan tu~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - thanh ((trung cua) or (trung tuan)) nhung cong thanh chan tu*.