Perhaps you should try some spelling variations:
thanh trinh » hanh trinh, thanh tinh, thanh binh
nhanh trinh » hanh trinh, nhanh tinh, nhanh thanh
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
dong cong » duong cong, dung cong, dang cong
cua dong » chua dong, cua cong, cua dang
dan than » dan chan, ban than, van than

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: doi chieu sang - ((nhanh trinh) OR (thanh trinh)) cua dong cong ((dan than) OR (tinh toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - ((nhanh trinh) OR (thanh trinh)) cua dong cong ((dan than) or (tinh toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((nhanh trinh) OR (thanh trinh)) cua dong cong ((dan than) or (tinh toan)) cau*.