Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
mai khoi » mai khoa, tai khoa, cac khoi
hoc sach » hoc sinh, hoc cac, hoc anh
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
vi cua » vai cua, di cua

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: hoc sach v nang ((xa hoi) OR (mai khoi)). hieu va cac duc va danh vi cua triet~.
• Adding a wildcard symbol may retrieve word variants: hoc sach v nang ((xa hoi) or (mai khoi)). hieu va cac duc va danh vi cua triet*.