Perhaps you should try some spelling variations:
manh trung » manh tung, thanh trung, manh hung
chieu sach » chinh sach, chiet tach, chieu sang
hieu manh » chieu xanh, hieu nganh, dieu hanh
dung cong » dung trong
trung ap » trung cap, trung lap, trung tam
cong tan » cong tac, cong san, cong thanh
tan chan » dan chan, ban chan, can chan
chan cau » phan cau, can cau, chinh cau
ap dung » xay dung, van dung

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 ((hieu manh) OR (chieu sach)) - manh trung ap dung cong tan chan cau~.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu sach)) - manh trung ap dung cong tan chan cau*.