Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
manh trung » manh tung, thanh trung, manh hung
trung phan » trung thanh, trung ha, dung phan
hien xanh » hien hanh, chieu xanh, hien khanh
phan dung » phan ung, phan dang, chan dung
dung cong » dung trong
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) or (hien nhanh)) - manh trung phan dung cong san than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - manh trung phan dung cong san than cau*.