Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
tham xuc » tham nuoc, tham thuc, pham duc
cua viet » hoa viet, cua vat, cua dieu
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
va hanh » van hanh, va thanh, va danh
ca viet » va viet, co viet, hoa viet
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach y nang x ho. hieu va tham xuc va hanh vi ((cua te) or (((cua viet) OR (ca viet))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach y nang x ho. hieu va tham xuc va hanh vi ((cua te) OR (((cua viet) OR (ca viet)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach y nang x ho. hieu va tham xuc va hanh vi ((cua te) or (((cua viet) OR (ca viet))))".
• Adding a wildcard symbol may retrieve word variants: doc sach y nang x ho. hieu va tham xuc va hanh vi ((cua te) or (((cua viet) OR (ca viet))))*.