Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tranh » canh tranh, hanh trinh, hanh trang
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
tan toan » tan tran, tap toan, dan toan
van toan » van tuan, van tan, van thanh
tap quan » tac quan, hai quan

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

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