Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
luoc van » luoc can, luoc va, luc van
danh du » danh dau, danh tu, dinh du
xuc van » duc van, luc van, vuc van
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
dai hoi » dai hoc, dai hai, dai moi
mai hoi » mai khoi, lai hoi, mai doi
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
du cua » duy cua, dau cua, dum 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 ty nang ((mai hoi) OR (dai hoi)). hieu ve cam ((xuc van) OR (luoc van)) danh du cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang ((mai hoi) OR (dai hoi)). hieu ve cam ((xuc van) or (luoc van)) danh du cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ((mai hoi) OR (dai hoi)). hieu ve cam ((xuc van) or (luoc van)) danh du cua triet*.