Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
truong cao » truong dai
nhung cong » thong cong, hang cong, nhung don
hoc thieu » toc thieu, hoc hien
trung cap » trung tam
dung cong » dung trong
tran tuan » tran xuan, tran quang, tran thanh
tac tran » tan tran, tac trai, tac tren

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