Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
cong thanh » dong thanh, cong trinh, cong tan
hoc thieu » toc thieu, hoc hien
trung cap » truong cao, trung tam
tang luan » dung luan
dung cong » dung trong
thanh van » thanh san, thanh toan, thanh phan

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 cap) or (tang luan)) dung cong thanh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((trung cap) OR (tang luan)) dung cong thanh van ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((trung cap) or (tang luan)) dung cong thanh van ban*.