Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
van hac » van hoc, van hai, van chat
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
van ha » van hoa, van chat, van hanh
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 ky lang xa hoi. hieu ((van hac) or (van ha)) thuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky lang xa hoi. hieu ((van hac) OR (van ha)) thuc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang xa hoi. hieu ((van hac) or (van ha)) thuc va hanh vi cua tre*.