Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
sang tao » hang tai
hieu ket » hieu kem, thien ket, lien ket
cua viet » ca viet, hoa viet, cua vat
sang ma » tang ma, nang ma, mang may
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach y ((sang ma) or (sang tao)) hoi. hieu ket cau luc va hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y ((sang ma) OR (sang tao)) hoi. hieu ket cau luc va hanh vi cua viet*.