Perhaps you should try some spelling variations:
hien khang » hien khanh, chien thang, thieu khang
hanh tranh » hanh trinh, hanh trang, lanh tranh
chung cong » nhung cong, chong cong, phung cong
cua chung » cua nhung, luan chung, luat chung
van toan » van tuan, van thanh, manh toan
van tan » van tuan, van ban, van tai

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