Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh luan » trinh luan, trinh luat, doanh luan
tieu sach » chieu sach, dien sach, te sach
luan hang » luan nang, luan han, luan hung
hang cong » dang cong, hang nong, bang cong
tap toan » tap doan, tap quan, bai toan
van tuan » van quan, van ban, anh tuan

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 sach - hanh tranh luan hang cong ((tap toan) or (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh tranh luan hang cong ((tap toan) OR (van tuan)) cau*.