Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu lang » chieu sang, hieu quang, nhieu tang
xa truong » cac truong
cua trung » cua truong, xuan trung, cua nhung
cong sang » cong san, cong lang, cong vang
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac
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 - thanh tung ((xa truong) OR (cua trung)) cong sang ((than cap) OR (khan cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - thanh tung ((xa truong) or (cua trung)) cong sang ((than cap) OR (khan cap))~".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh tung ((xa truong) or (cua trung)) cong sang ((than cap) OR (khan cap))*.