Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, va danh
co loi » co hoi
ve cac » va cac, vien cac
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.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty xang ((co hoc) or (co loi)). hieu ve cac xuc va hanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty xang ((co hoc) OR (co loi)). hieu ve cac xuc va hanh vi cau tren.
• Adding a wildcard symbol may retrieve word variants: thu sach ty xang ((co hoc) or (co loi)). hieu ve cac xuc va hanh vi cau tren*.