Perhaps you should try some spelling variations:
chiet tach » chieu sach
chieu sang » chieu sach, chieu xanh, hieu lang
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, hang cong
trung cap » truong cao, trung tam
tan thanh » tran thanh, tang thanh, toan thanh
thanh lap » thanh san, phan lap, thanh hai
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chiet tach) or (chieu sang)) - thanh ((trung cap) or (trung tuan)) nhung cong tan thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chiet tach) OR (chieu sang)) - thanh ((trung cap) OR (trung tuan)) nhung cong tan thanh lap.
• Adding a wildcard symbol may retrieve word variants: doi ((chiet tach) or (chieu sang)) - thanh ((trung cap) or (trung tuan)) nhung cong tan thanh lap*.