Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cau phuc » cau truc, chau phu, huu phuc
cau treo » cau theo, cau tren, cau triet
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
va cau » van cau, va cac, va dau
vi cau » ve cau, di cau, viet 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: thuoc sach ((ky lang) OR (ky tang)) xa hoi. hieu va cau phuc ((va hanh) OR (va danh)) vi cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((ky lang) or (ky tang)) xa hoi. hieu va cau phuc ((va hanh) OR (va danh)) vi cau treo~".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((ky lang) or (ky tang)) xa hoi. hieu va cau phuc ((va hanh) OR (va danh)) vi cau treo*.