Perhaps you should try some spelling variations:
tieu tinh » trieu tinh, tieu trinh, lieu tinh
hanh mang » nhanh mang, hanh trang, nhanh lang
dang cong » dung cong
tranh ban » trinh ban, tranh hang, tranh luan
mang cua » manh cua, dung cua, ban cua
cua dang » cua cong, cua ban
cong tan » cong tac, cong san, cong thanh
tran van » luan van

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 tinh - hanh mang cua dang cong tan ((tran van) or (tranh ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu tinh - hanh mang cua dang cong tan ((tran van) OR (tranh ban)).
• Adding a wildcard symbol may retrieve word variants: theo tieu tinh - hanh mang cua dang cong tan ((tran van) or (tranh ban))*.