Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
thu sach » tu sach, thuat sach, thuoc sach
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
ve cam » ve cac, va cam, ve cai
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: ((hoc sach) or (thu sach)) ky nang x hoi. hieu ((ve cam) or (ve cham)) tuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (thu sach)) ky nang x hoi. hieu ((ve cam) OR (ve cham)) tuc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (thu sach)) ky nang x hoi. hieu ((ve cam) or (ve cham)) tuc va hanh vi cua tre*.