Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
nang mai » nang ma, nang tai, lang mai
hanh ki » hanh vi, hanh ky, hanh kien
cuc ban » cua ban, cac ban, cuu ban
xuc ban » duc ban, quoc ban, xuat ban
tu sach » thu sach, su sach, tu cach
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
vu nang » vuc nang, va nang, vu dang
te sach » toc sach
va cao » va cac, va co, va dao
ki su » ky su

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: ((tu sach) OR (te sach)) vu nang mai hoi. hieu va cao ((xuc ban) OR (cuc ban)) hanh ki su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) vu nang mai hoi. hieu va cao ((xuc ban) or (cuc ban)) hanh ki su triet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) vu nang mai hoi. hieu va cao ((xuc ban) or (cuc ban)) hanh ki su triet*.