Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
ban thanh » ban hanh, ban hang
trung ha » trung hoc, trung tam, trung cap
trang va » tran van, hang va
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 - thanh ((trung ha) or (trang va)) thong cong ban thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh ((trung ha) OR (trang va)) thong cong ban thanh san.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((trung ha) or (trang va)) thong cong ban thanh san*.