Perhaps you should try some spelling variations:
cac truc » cau truc, cac tru, cac trung
vu sach » vu khach
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
su sach » so sach
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((vu sach) or (vu bach))) or (su sach)) ky lang xa hoi. hieu ve cac truc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((vu sach) OR (vu bach))) OR (su sach)) ky lang xa hoi. hieu ve cac truc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((vu sach) or (vu bach))) or (su sach)) ky lang xa hoi. hieu ve cac truc va hanh vi cua tre*.