Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
nho chieu » ho chieu, nho hieu, theo chieu
trung cao » truong cao, trung cap, trung co
dung cong » dung trong
cao dung » cao dang, cao dong, cao ung
cong tan » cong tac, cong san, cong thanh
tban can » toan can, toan cao, toan cau
ban can » ban dan, ban hang, ban hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho chieu sang - thanh trung cao dung cong tan ((tban can) or (ban can))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho chieu sang - thanh trung cao dung cong tan ((tban can) OR (ban can))*.