Perhaps you should try some spelling variations:
hoc thuyet » hoc chuyen
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
hoc thuat » hoc thuc, hoc chat, hoc thiet
dang cong » dung cong
hanh han » hanh nhan, hanh phan, hanh san
cua dang » cua cong, cua ban
toan cau » toan cao, toan ban, toan tap
han cua » hang cua, nhan cua, than cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thuat) or (hoc thuyet)) tach - hanh han cua dang cong thanh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thuat) OR (hoc thuyet)) tach - hanh han cua dang cong thanh toan cau.
• Adding a wildcard symbol may retrieve word variants: ((hoc thuat) or (hoc thuyet)) tach - hanh han cua dang cong thanh toan cau*.