Perhaps you should try some spelling variations:
dang bai » dung bai, dang hai, dang ba
cua viet » ca viet, cua vat, cua dieu
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
bai hoc » dai hoc
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cam tu » cam thu, nam tu, dam tu
thuc » thu

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 ky dang bai hoc. hieu ve ((am thuc) or (cam tu)) va hanh vi ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang bai hoc. hieu ve ((am thuc) OR (cam tu)) va hanh vi ((cua viet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: su sach ky dang bai hoc. hieu ve ((am thuc) or (cam tu)) va hanh vi ((cua viet) or (hoa viet))*.