Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
truong cap » truong cao, trung cap, trong cap
truong ca » truong cao, truong va, trong ca
dung cong » dung trong
ban thanh » ban hanh, ban hang
thanh cac » hanh cac, thanh bac, thanh ca
cong ban » cong bang, cong san, cong tan

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) OR (chieu xanh)) - thanh ((truong cap) or (truong ca)) dung cong ban thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - thanh ((truong cap) OR (truong ca)) dung cong ban thanh cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (chieu xanh)) - thanh ((truong cap) or (truong ca)) dung cong ban thanh cac".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (chieu xanh)) - thanh ((truong cap) or (truong ca)) dung cong ban thanh cac*.