Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh vai » hanh vi, hanh va, hanh tai
va hanh » van hanh, va thanh, va danh
cac toc » cac toi, cac nuoc, cac thoi
hieu ve » hieu va, hieu van
su sach » vu sach
so sach » so sanh, bo sach, co sach
v nang » va nang, vu nang, van nang
ve cac » va cac, vien cac
y nang » ky nang, ly nang, may nang
toc va » hoc va, toc ta, tuc va
vai su » va su, van su, lai su
ma hoi » mai hoi, xa hoi, ma hoa

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