Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan
van tuan » van quan, van ban, anh tuan
ho hieu » ho chieu, hoi hieu, nho hieu

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

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