Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trung » thanh trung, hanh trang, manh trung
hoc thieu » toc thieu, hoc hien
trung cao » truong cao, trung cap, trung co
cong van » cong vang, song van, cong tan
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - hanh trung cao dang ((cong van) or (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh trung cao dang ((cong van) OR (cong san)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh trung cao dang ((cong van) or (cong san)) toan cau*.