Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
cau tren » cu tren, dau tren, ca tren
sach thu » sach thieu, sach tham, cach thuc
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
sach ty » sach y, sach tu, xach tay
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
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: te ((sach ty) OR (((sach thu) OR (sach thue)))) nang ma hoi. hieu va cam xuc va hanh vi cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (((sach thu) OR (sach thue)))) nang ma hoi. hieu va cam xuc va hanh vi cau tren~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (((sach thu) OR (sach thue)))) nang ma hoi. hieu va cam xuc va hanh vi cau tren*.