Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
cuu tre » cua tre, cau tren
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
te sach » toc sach
vu nang » vuc nang, va nang, vu dang
xuc va » duc va, tuc va, luc va
v nang » va nang, van nang, voi nang
va cam » va cham, va cac, va cao

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

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