Perhaps you should try some spelling variations:
van thuong » va thuong, van phuong, van truong
khien bang » phien ban, khien dong
van chuong » van phong, van duong, van hung
hien sang » hien trang, chieu sang, thien bang
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 ((hien sang) OR (khien bang)) - canh tranh ((van thuong) or (van chuong)) cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sang) OR (khien bang)) - canh tranh ((van thuong) OR (van chuong)) cong van toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien sang) OR (khien bang)) - canh tranh ((van thuong) or (van chuong)) cong van toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sang) OR (khien bang)) - canh tranh ((van thuong) or (van chuong)) cong van toan ban*.