Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
danh sai » dung sai, danh bat, danh dau
trung va » truong va, trang va, trung ha
cua tre » cua te, cuu tre, cua triet
va danh » va dinh, va dan, va hanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van cac » van cau, van bac, dan cac
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
van hac » van hoc, van ha, van hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang xa hoi. hieu ((van cac) or (van hac)) trung va danh sai ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. hieu ((van cac) OR (van hac)) trung va danh sai ((cua tre) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu ((van cac) or (van hac)) trung va danh sai ((cua tre) or (cua viet))*.