Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van cau » van dau, van hau, van chat
cau tuc » cau truc, cau tu, cau luc
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi
5 hoi » o hoi

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 nang ((((x hoi) OR (5 hoi))) or (x ho)). hieu van cau tuc va hanh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((((x hoi) OR (5 hoi))) OR (x ho)). hieu van cau tuc va hanh di cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((((x hoi) OR (5 hoi))) or (x ho)). hieu van cau tuc va hanh di cua viet*".