Perhaps you should try some spelling variations:
chien thang » chien thuong, chien chong, hien trang
hanh tranh » hanh trinh, hanh trang, lanh tranh
hoc chien » hoc hien, hoach chien, hoc chuyen
cua chung » luan chung, luat chung, cua cong
cua nhung » va nhung
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chien thang - ((hanh tranh) or (canh tranh)) ((cua chung) OR (cua nhung)) cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chien thang - ((hanh tranh) OR (canh tranh)) ((cua chung) OR (cua nhung)) cong van toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chien thang - ((hanh tranh) or (canh tranh)) ((cua chung) OR (cua nhung)) cong van toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc chien thang - ((hanh tranh) or (canh tranh)) ((cua chung) OR (cua nhung)) cong van toan ban*.