Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » vu sach
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
van cac » van hac, van cau, van bac
cac tru » ca tru, cac tro, cac thu
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
y nang » ky nang, ly nang, v nang
tru va » truc va, tu va, trung va
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) OR (so sach)) y nang ma hoa. hieu van cac tru va hanh ((vi cua) OR (hai cua)) tre~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) y nang ma hoa. hieu van cac tru va hanh ((vi cua) or (hai cua)) tre*.