Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
dang cong » dung cong
thi hieu » thi chieu, thi hien, thi dieu
hanh han » hanh nhan, hanh phan, hanh san
cua dang » cua cong, cua ban
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap
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 thieu) or (thi hieu)) xanh - hanh han cua dang cong san than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (thi hieu)) xanh - hanh han cua dang cong san than cau*.