Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
trung hoc » trung quoc
trung ha » trung tam, trung cap
cong san » cong tac
san nang » van nang, san sang, ban nang

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 (chieu xanh)) - thanh ((trung ha) OR (trung hoc)) nhung cong san nang cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu xanh)) - thanh ((trung ha) OR (trung hoc)) nhung cong san nang cao~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu xanh)) - thanh ((trung ha) OR (trung hoc)) nhung cong san nang cao*.