Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong ban » cong bang, cong san, cong tan
tban cau » toan cau, toan cao, ban can
ho hieu » ho chieu, hoi hieu, nho hieu
ban cau » bang cau, ban can, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - thanh trung cua nhung cong ban ((tban cau) or (ban cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh trung cua nhung cong ban ((tban cau) OR (ban cau)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh trung cua nhung cong ban ((tban cau) or (ban cau))*.