Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
dung duong » dung dong, dong duong, dung dung
duong manh » duong van
hieu manh » hieu nganh, dieu hanh, hien hanh
manh toan » thanh toan, anh tuan, tinh toan
trung va » truong va, trang va, trung ha
toan cao » toan ban, toan tap
va dung » van dung, va duong, vat dung

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) OR (chieu xanh)))) - thanh trung va dung duong manh toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (((hieu manh) OR (chieu xanh)))) - thanh trung va dung duong manh toan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (((hieu manh) OR (chieu xanh)))) - thanh trung va dung duong manh toan cao*.