Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
quan vai » quan vi, quan tai, quan hai
hieu va » lieu va, hieu qua
va cham » va chat, va tham
duc van » duc va, duc manh, duc phan
vai cua » dai cua, hai cua, lai cua
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang

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: thu sach ((y nang) OR (v nang)) ma hoa. hieu va cham ((duc van) OR (duc tan)) quan vai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((y nang) or (v nang)) ma hoa. hieu va cham ((duc van) OR (duc tan)) quan vai cua triet~".
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) or (v nang)) ma hoa. hieu va cham ((duc van) OR (duc tan)) quan vai cua triet*.