Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
hanh tai » thanh tai, hang tai, han tai
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, dua tren
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
tuc va » thuc va, truc va, tuc xa
va tuc » va thuc, va tu, va tac
van va » van vat, van van, ban va
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 ky nang ma hoi. hieu van va tuc va hanh tai ((cua tre) OR (((cua triet) OR (su triet))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ma hoi. hieu van va tuc va hanh tai ((cua tre) or (((cua triet) OR (su triet))))~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ma hoi. hieu van va tuc va hanh tai ((cua tre) or (((cua triet) OR (su triet))))*.