Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
hieu van » hieu va, thien van, lieu va
hoc thuc » hoc huu
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
van hoc » van hoa
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang x) OR (lang van)) hoi. hieu van hoc thuc va hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang x) or (lang van)) hoi. hieu van hoc thuc va hanh vi cua tre*.