Perhaps you should try some spelling variations:
su sach » so sach, vu sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
van hac » van hoc, van ha, van hai
van cac » van cau, van bac, dan cac
bo sach » co sach, hoc sach
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 (bo sach)) y nang x hoi. hieu ((van cac) OR (van hac)) tuc va danh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (bo sach)) y nang x hoi. hieu ((van cac) OR (van hac)) tuc va danh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (bo sach)) y nang x hoi. hieu ((van cac) OR (van hac)) tuc va danh vi cua te*.