Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
thong tac » thong cac, tuong tac, thong tai
thanh cac » hanh cac, thanh bac, thanh ca
toan cau » toan cao, toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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: ho hieu lang - hanh trung cua thong thong tac ((toan cau) OR (thanh cac))~.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh trung cua thong thong tac ((toan cau) or (thanh cac))*.