Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
qua ban » cua ban, qua quan
dua ban » dia ban, cua ban, mua ban
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
duc ban » duc tan, duc van, duc man
va cam » va cham, va cac, va cao
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho
vi su » va su, ve su, ki 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 v nang x hoi. hieu va cam ((duc ban) OR (((dua ban) OR (qua ban)))) hanh vi su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang x hoi. hieu va cam ((duc ban) or (((dua ban) OR (qua ban)))) hanh vi su triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach v nang x hoi. hieu va cam ((duc ban) or (((dua ban) OR (qua ban)))) hanh vi su triet*.