Perhaps you should try some spelling variations:
thu phuong » thi phuong, thu huong, theo phuong
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
quang cua » quan cua, quang tuan, quang huy
dan than » dan chan, ban than, van than
van toan » van tuan, van tan, van thanh
cua thu » cua chu, ca thu, cua tu

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 hanh)) - nhanh quang cua thu phuong ((dan than) OR (van toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien hanh)) - nhanh quang cua thu phuong ((dan than) or (van toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien hanh)) - nhanh quang cua thu phuong ((dan than) or (van toan)) cau*.