Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cuu thuc » cuu tac
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
thuc va » thuc vat, thuc dan, thuc day
va dinh » van dinh, va kinh, va tinh
dinh vi » dinh ve, dinh viet, dinh tri
ma hoi » mai hoi, xa hoi, ma hoa
va cuu » va cau, va chu, va huu
vi va » vi van, vai va, vu va

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) or (hoc sach)) ky nang ma hoi. lieu va cuu thuc va dinh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (hoc sach)) ky nang ma hoi. lieu va cuu thuc va dinh vi va triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (hoc sach)) ky nang ma hoi. lieu va cuu thuc va dinh vi va triet*.