Perhaps you should try some spelling variations:
thanh tung » thanh cong
trinh toan » tinh toan, thanh toan, trinh han
theo dien » theo tieu, thu dien, thuy dien
dien sach » dien anh
cua dong » chua dong, cua cong, cua nong
cua dang » cua cong, cua ban
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 dien sach - thanh tung ((cua dong) or (cua dang)) cong trinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo dien sach - thanh tung ((cua dong) OR (cua dang)) cong trinh toan cau.
• Adding a wildcard symbol may retrieve word variants: theo dien sach - thanh tung ((cua dong) or (cua dang)) cong trinh toan cau*.