Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
vu nang » vuc nang, va nang, vu dang
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
v nang » va nang, van nang, voi nang
va cam » va cham, va cac, va cao
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: tu sach ((v nang) OR (vu nang)) xa hoi. hieu va cam xuc va hanh vi ((cuu tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((v nang) OR (vu nang)) xa hoi. hieu va cam xuc va hanh vi ((cuu tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((v nang) OR (vu nang)) xa hoi. hieu va cam xuc va hanh vi ((cuu tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach ((v nang) OR (vu nang)) xa hoi. hieu va cam xuc va hanh vi ((cuu tre) or (cua te))*.