Perhaps you should try some spelling variations:
nganh cong » nhanh chong, thanh cong
sach ngan » sach ngon, sach nha, sach han
ngan cong » nganh nong, ngan hang, phan cong
cong khi » cong thai, khong khi, co khi
su sach » vu sach
so sach » bo sach, co sach, hoc 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 sach) or (so sanh)) nganh cong 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 sach) OR (so sanh)) nganh cong khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( su sach ngan cong khi đong luc ) or ( ((so sach) or (so sanh)) nganh cong khi đong luc ))*.