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
hanh than » hanh han, hanh nhan, hanh phan
dang cong » dung cong
than cua » nhan cua, thai cua, ban cua
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: ((hoc thuat) or (hoc thuyet)) tach - hanh than 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 than cua dang cong thanh toan cau.
• Adding a wildcard symbol may retrieve word variants: ((hoc thuat) or (hoc thuyet)) tach - hanh than cua dang cong thanh toan cau*.