Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung cap, dung cua
nho hieu » nha hieu, nho sieu, nhu hieu
cong tap » cuong tap, cong tan, tong tap
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: nho hieu lang - hanh ((trung cua) OR (trung tuan)) nhung ((cong tap) OR (cong tac)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nho hieu lang - hanh ((trung cua) OR (trung tuan)) nhung ((cong tap) or (cong tac)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: nho hieu lang - hanh ((trung cua) OR (trung tuan)) nhung ((cong tap) or (cong tac)) toan cau*.