Perhaps you should try some spelling variations:
nganh cong » nhanh chong, thanh cong
hoc nganh » hoc nhanh
sach danh » sach tranh, sach dao, sach dung
cao khai » cao chat, cao tai, cao thi
cong khi » cong thai, khong khi, cong ha
so sach » so sanh, bo sach, co sach
su hoc » tu hoc, du hoc, so hoc

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 danh ((cao khai) OR (co khi)) đong luc ) or ( su hoc nganh cong khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sach danh ((cao khai) OR (co khi)) đong luc ) OR ( su hoc nganh cong khi đong luc ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( so sach danh ((cao khai) OR (co khi)) đong luc ) or ( su hoc nganh cong khi đong luc ))*".