Perhaps you should try some spelling variations:
thanh tung » thanh cong
tieu sach » chieu sach, dien sach, te sach
dong cong » duong cong, dung cong, dang cong
cong tinh » cong trinh, cong vinh, long tinh
tung cua » trung cua, tuong cua, dung cua
cua dong » chua dong, cua cong, cua dang
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - thanh tung cua dong cong tinh toan cau~.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - thanh tung cua dong cong tinh toan cau*.