Perhaps you should try some spelling variations:
su sach » vu sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
van bac » van ban, van bao, van hac
van cac » van hac, van cau, dan cac
so sach » so sanh, bo sach, co sach
y nang » ky nang, ly nang, v nang
toc va » hoc va, toc ta, tuc va
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.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) y nang x hoi. hieu ((van cac) OR (van bac)) toc va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y nang x hoi. hieu ((van cac) OR (van bac)) toc va danh vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) y nang x hoi. hieu ((van cac) OR (van bac)) toc va danh vi cua te*".