Perhaps you should try some spelling variations:
gach ngoai » gach ngoi, dich ngoai
ngoai mang » ngoai cong, ngoai ma
ngan dang » ngan hang, nhan dang, ngan danh
dang khoi » dung khoa, hang khoa
mang khi » bang khi, dang khai, cong khi
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((so sach) OR (bo sach)) ngan dang khoi đong luc ) or ( so gach ngoai mang khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((so sach) OR (bo sach)) ngan dang khoi đong luc ) OR ( so gach ngoai mang khi đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((so sach) OR (bo sach)) ngan dang khoi đong luc ) or ( so gach ngoai mang khi đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( ((so sach) OR (bo sach)) ngan dang khoi đong luc ) or ( so gach ngoai mang khi đong luc ))*.