Perhaps you should try some spelling variations:
hoc thieu » hoc hien
canh tran » canh tranh, hanh trang, banh trang
dong hang » dong bang, dong hung, dong nang
hang hang » nang hang, cang thang, hung thang
tran van » luan van
hang ban » hang luan, hang va, hang tai
ban cau » bang cau, ban can, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc thieu) or (hoc thieu)) tach - canh tran van dong hang hang ban cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc thieu) OR (hoc thieu)) tach - canh tran van dong hang hang ban cau*.