Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
tran tuan » tran xuan, tran quang, tran thanh
trung cap » truong cao, trung tam
cong van » cong vang, cong san, song van
van than » van thanh, van thang, van tuan
than cau » toan cau, phan cau, than cap

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 - thanh ((tran tuan) OR (trung cap)) trong cong van than cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((tran tuan) or (trung cap)) trong cong van than cau*.