Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trinh toan » tinh toan, trinh quan, trinh hoa
thanh toan » thanh hoa, thanh san, tinh toan
hieu lang » chieu sang, hieu quang, nhieu tang
hanh manh » hanh mang, lanh manh, hoang manh
cua nhung » va nhung
trinh han » trinh quan
hoi hieu » hoi phieu, hoi tieu, moi hieu
manh cua » doanh cua, ban cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - hanh manh cua nhung cong ((((trinh toan) OR (thanh toan))) OR (trinh han)) dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi hieu lang - hanh manh cua nhung cong ((((trinh toan) OR (thanh toan))) or (trinh han)) dau~".
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - hanh manh cua nhung cong ((((trinh toan) OR (thanh toan))) or (trinh han)) dau*.