Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
truong cao » truong dai
trung tuan » trung thanh, trung tam, tran tuan
trung cap » trung tam
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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