Perhaps you should try some spelling variations:
danh trung » dang trung, dinh trung, thanh trung
manh trung » manh tung, thanh trung, manh hung
hien xanh » hien hanh, hien nhanh, chieu xanh
dung cong » dung trong
cap dung » ap dung, cao dung, chan dung
cong tan » cong tac, cong san, cong thanh
tan canh » van canh, dan canh, tao canh
canh cau » canh chau, can cau, danh cau

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 hien xanh - ((danh trung) OR (manh trung)) cap dung cong tan canh cau~.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((danh trung) or (manh trung)) cap dung cong tan canh cau*.