Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh sinh » hanh tinh, hanh dinh, hinh sinh
cua nhung » va nhung
hoi hieu » hoi phieu, hoi tieu, doi chieu
moi hieu » moi dieu, doi chieu, mot chieu
sinh cua » manh cua, dinh cuu, sinh va
qua dau » qua da, qua dan, qua dat
qua bau » qua ban, qua lau, quang bau

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