Perhaps you should try some spelling variations:
ngan cong » nganh cong, nganh nong, ngan hang
xach ngan » sach ngan, anh ngan, cac ngan
tac danh » sach danh, cac doanh, cac dan
cong khi » cong thai, khong khi, co khi
danh bo » dinh bo, danh co, danh o
su xach » su sach, su xac
su tac » su tai, so tac, su cac
bo khi » co khi, bo chi, bo thi

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: (( su tac danh bo khi đong luc ) OR ( su xach ngan cong khi đong luc ))~.
• Adding a wildcard symbol may retrieve word variants: (( su tac danh bo khi đong luc ) or ( su xach ngan cong khi đong luc ))*.