Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
trong song » trong cong, trong nong, trong dong
hien xanh » hien hanh, chieu xanh, hien khanh
tung tao » tuong tac, trong tao, trung tai
song van » hoang van, trong van, duong van
van phan » van phong, van thanh, luan phan
phan cau » phan dau, phan cac, phan tu

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)) - thanh ((tung tao) OR (trung tam)) trong song van phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - thanh ((tung tao) OR (trung tam)) trong song van phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien nhanh)) - thanh ((tung tao) OR (trung tam)) trong song van phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien nhanh)) - thanh ((tung tao) OR (trung tam)) trong song van phan cau*.