Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doc sach » hoc sach, toc sach, nuoc sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
y nang » ly nang, v nang, may nang
ve cam » ve cham, ve cac, va cam
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: doc sach ((y nang) OR (ky nang)) ((xa hoi) OR (mai hoi)). hieu ve cam duc va hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach ((y nang) OR (ky nang)) ((xa hoi) or (mai hoi)). hieu ve cam duc va hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: doc sach ((y nang) OR (ky nang)) ((xa hoi) or (mai hoi)). hieu ve cam duc va hanh vi cua triet*.