Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua viet » hoa viet, cua vat, cua dieu
tham xuc » tham nuoc, tham thuc, pham duc
tu sach » thu sach, su sach, te sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
ca viet » va viet, co viet, hoa viet
xuc va » duc va, tuc va, luc va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky tang xa hoi. hieu va tham xuc va danh vi ((cua viet) OR (ca viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuat sach)) ky tang xa hoi. hieu va tham xuc va danh vi ((cua viet) OR (ca viet))~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky tang xa hoi. hieu va tham xuc va danh vi ((cua viet) OR (ca viet))*.