Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
dang cong » dung cong
cong danh » cuong danh, cong dan, cong thanh
trung va » truong va, trang va, trung ha
va dang » van dang, va nang, va lang
quan ha » quan he
tuan tu » tuan thu, tran tu, toan 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 ((chieu xanh) OR (chieu sach)) - thanh trung va dang cong danh ((quan ha) OR (tuan tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) OR (chieu sach)) - thanh trung va dang cong danh ((quan ha) or (tuan tu))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) OR (chieu sach)) - thanh trung va dang cong danh ((quan ha) or (tuan tu))*.