Perhaps you should try some spelling variations:
te sach » toc sach
hanh di » hanh de, hang di, danh di
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
tu nong » tu dong, tu cong, tu tong
tu nang » tru nang, tu nano, tu lang
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cac, va cao

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 ((tu nang) OR (tu nong)) xa hoi. hieu va cam tuc va ((hanh di) OR (hanh vi)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu nang) OR (tu nong)) xa hoi. hieu va cam tuc va ((hanh di) or (hanh vi)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nang) OR (tu nong)) xa hoi. hieu va cam tuc va ((hanh di) or (hanh vi)) cua tre*.