Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cau treo » cau theo, cau tren, cau triet
vu nang » vuc nang, va nang, vu dang
hieu ve » hieu van
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va
vi cau » va cau, ve cau, di cau

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: toc sach ((y nang) OR (vu nang)) ma hoi. ((hieu ve) OR (hieu va)) cam xuc va danh vi cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y nang) or (vu nang)) ma hoi. ((hieu ve) OR (hieu va)) cam xuc va danh vi cau treo~".
• Adding a wildcard symbol may retrieve word variants: toc sach ((y nang) or (vu nang)) ma hoi. ((hieu ve) OR (hieu va)) cam xuc va danh vi cau treo*.