Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hien xanh » hien hanh, hien nhanh, hien khanh
ban thanh » ban hanh, ban hang
thanh tap » thanh lap, thanh tai, thanh tay
hanh han » hanh nhan, hanh phan, hanh san
va thong » va phuong, he thong, va cong
cong ban » cong bang, cong san, cong tan

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 (chieu xanh)) - hanh han ((va thong) OR (va thuong)) cong ban thanh tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (chieu xanh)) - hanh han ((va thong) OR (va thuong)) cong ban thanh tap~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu xanh)) - hanh han ((va thong) OR (va thuong)) cong ban thanh tap*.