Perhaps you should try some spelling variations:
nang dai » nang dau, nang tai, lang dai
dai khoa » da khoa, tai khoa, dac khoa
hanh may » hanh ma, hanh mau, hanh ngay
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
va hanh » van hanh, va thanh, va danh
cua tre » cuu tre, cua triet, dua tren
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
cua te » cua tu

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 ky nang dai khoa. hieu ve cac luc va hanh may ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang dai khoa. hieu ve cac luc va hanh may ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: so sach ky nang dai khoa. hieu ve cac luc va hanh may ((cua tre) or (cua te))*.