Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
thanh tung » thanh cong
toc thien » toc thieu, ton thien, duoc thien
dung cong » dung trong
ap dung » xay dung, van dung
ty toan » tap toan, huy toan, tam toan
ly toan » le toan, ly hoan, ly tran

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: toc thien danh - ((thanh trung) OR (thanh tung)) ap dung cong ((ty toan) OR (ly toan)) cau~.
• Adding a wildcard symbol may retrieve word variants: toc thien danh - ((thanh trung) or (thanh tung)) ap dung cong ((ty toan) or (ly toan)) cau*.