Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh trung » thanh tung
truong cong » trong cong, truong dong, truong long
hien nhanh » hien hanh, tien thanh, dien thanh
cua truong » cua trung, xuan truong, cac truong
trung cua » truong cua, trung tuan, trung cap
van toan » van tuan, van thanh, manh toan
van tan » van tuan, van ban, van tai

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