Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh vai » hanh va, hanh tai, hanh van
toc tay » toc thai
cac toc » cac toi, cac nuoc, cac thoi
hieu ve » hieu va, hieu van
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
bo sach » co sach, hoc sach
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac

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) OR (bo sach)) y nang ma hoi. hieu ve cac toc tay ((hanh vai) OR (hanh vi)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (bo sach)) y nang ma hoi. hieu ve cac toc tay ((hanh vai) OR (hanh vi)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (bo sach)) y nang ma hoi. hieu ve cac toc tay ((hanh vai) OR (hanh vi)) cua triet*.