Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh trang » thanh trung, canh tranh, hanh trinh
hien xanh » hien hanh, chieu xanh, hien khanh
hua khong » hoa khong, cua khong, hoac khong
phat cau » phan cau, pha cau, phap cau
cong va » dong va, cong ha, cong tac

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) OR (hien nhanh)) - hanh trang ((hua khong) OR (cua cong)) cong va phat cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien nhanh)) - hanh trang ((hua khong) or (cua cong)) cong va phat cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien nhanh)) - hanh trang ((hua khong) or (cua cong)) cong va phat cau*.