Perhaps you should try some spelling variations:
sanh nganh » anh ngan, dang nganh, sang ngang
sach ngan » sach ngon, sach nha, sach han
ngan cong » nganh cong, nganh nong, ngan hang
cong khi » cong thai, khong khi, cong ha
nganh co » nganh cong, nganh hoa, nganh y
su sach » so sach, vu sach
so sanh » do sanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach ngan cong khi đong luc ) or ( so sanh nganh co khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach ngan cong khi đong luc ) OR ( so sanh nganh co khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( su sach ngan cong khi đong luc ) or ( so sanh nganh co khi đong luc ))*.