Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
truong cua » truong ca, truong quan, truong cao
hien sang » hien trang, khien bang, chieu sang
tong cong » trong cong, cong cong, dung cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien sang - hanh ((trung tuan) or (truong cua)) tong cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sang - hanh ((trung tuan) OR (truong cua)) tong cong san toan ban*.