Perhaps you should try some spelling variations:
dang nguong » dung nguon, dang thuong, tang nguon
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nguong dan » huong dan
mang cua » manh cua, dung cua, cong cua
than man » than ma, tran manh, than phan
ban cua » ban quan

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: theo chieu sach - hanh ((mang cua) OR (ban cua)) dang nguong dan ((than man) OR (thanh san))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh ((mang cua) or (ban cua)) dang nguong dan ((than man) OR (thanh san))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((mang cua) or (ban cua)) dang nguong dan ((than man) OR (thanh san))*.