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
tan chan » ban chan, can chan, tam chan
dan chan » dan gian, dan ca, van chat
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) OR (dan chan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu sach)) - manh trung ap dung cong ((tan chan) OR (dan chan)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu sach)) - manh trung ap dung cong ((tan chan) OR (dan chan)) cau*.