Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
cua thong » cua thuong, cua khong, cua tong
tung cua » trung cua, tuong cua, dung cua
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
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: hoc ((thieu khang) OR (chieu sach)) - thanh tung cua thong ((cong dan) OR (cong tan)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu khang) or (chieu sach)) - thanh tung cua thong ((cong dan) OR (cong tan)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu khang) or (chieu sach)) - thanh tung cua thong ((cong dan) OR (cong tan)) toan cau*.