Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
quoc ban » quoc bao, quoc lan, quoc quan
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
duc ban » duc tan, duc van, dua ban
hang vi » hang va, hanh vi, hang di
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
va cam » va cham, va cac, va cao
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: su sach v nang xa hoi. hieu va cam ((duc ban) OR (quoc ban)) hang vi cua triet~.
• Adding a wildcard symbol may retrieve word variants: su sach v nang xa hoi. hieu va cam ((duc ban) or (quoc ban)) hang vi cua triet*.