Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh dinh » thanh dinh, hinh dinh, hanh tinh
cua nhung » va nhung
trinh san » trinh quan, trinh toan, trinh luan
trinh han » trinh quan
hoi hieu » hoi phieu, hoi tieu, doi chieu
moi hieu » moi dieu, doi chieu, mot chieu
dinh cua » dinh cuu, sinh cua, dinh cu

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) OR (moi hieu)) lang - hanh dinh cua nhung cong ((trinh san) OR (trinh han)) dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoi hieu) OR (moi hieu)) lang - hanh dinh cua nhung cong ((trinh san) or (trinh han)) dau~".
• Adding a wildcard symbol may retrieve word variants: ((hoi hieu) OR (moi hieu)) lang - hanh dinh cua nhung cong ((trinh san) or (trinh han)) dau*.