Perhaps you should try some spelling variations:
nhanh khong » nhanh chong, nganh khong, nhan khong
sach nhanh » cach nhanh, sach nha, sach tranh
khong khi » khong he
cap danh » cau danh, tap danh, lap doanh
cao danh » cao dang, cao anh, cau danh
so sach » so sanh, bo sach, co sach
hoa khi » hoa phi, hoa hi, hoa thi

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