Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
ty nang » ky nang, ty hang, ly nang
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
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 ((ty nang) OR (ty xang)) ((xa hoi) OR (mai hoi)). hieu va cam xuc va hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ty xang)) ((xa hoi) or (mai hoi)). hieu va cam xuc va hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) OR (ty xang)) ((xa hoi) or (mai hoi)). hieu va cam xuc va hanh vi cua triet*.