Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tham xuc » tham nuoc, tham thuc, pham duc
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
vu nang » vuc nang, va nang, vu dang
hieu va » hieu qua
di cua » dai cua, doi cua, de cua
xuc va » duc va, tuc va, luc va
cua te » cua tu
v nang » va nang, van nang, voi nang

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

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