Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh dau » lanh dao, hang dau, danh tu
dau cua » dai cua, day cua, cau cua
luc van » luoc van, luu van, duc van
xuc van » duc van, vuc van, xuc ban
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ty xang, ty hang, ly nang
ve cham » va cham, ve chat, vu cham

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 ((ty nang) OR (ky nang)) mai hoi. hieu ve cham ((xuc van) OR (luc van)) danh dau cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ky nang)) mai hoi. hieu ve cham ((xuc van) or (luc van)) danh dau cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) OR (ky nang)) mai hoi. hieu ve cham ((xuc van) or (luc van)) danh dau cua triet*.