Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
doc sach » hoc sach, nuoc sach, dac sac
tham xuc » tham nuoc, tham thuc, pham duc
toc sach » hoc sach, thuoc sach, nuoc sach
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
vi dung » va dung, vi ung, vi dong
xuc va » duc va, tuc va, luc va
x hoi » xa hoi, o hoi, x ho

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: ((te sach) OR (((toc sach) OR (doc sach)))) ky nang x hoi. hieu va tham xuc va danh vi dung tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (((toc sach) OR (doc sach)))) ky nang x hoi. hieu va tham xuc va danh vi dung tren~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (((toc sach) OR (doc sach)))) ky nang x hoi. hieu va tham xuc va danh vi dung tren*.