Perhaps you should try some spelling variations:
dung sai » dung tai, dung va, dung dat
hieu van » hieu va, thien van, lieu va
ve triet » va trien, su triet
te sach » toc sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
van cam » van nam, van lam, van cau
sach ky » sac ky, sach y, sach ty
cua cu » cua chu, cua cau, cua su
tuc va » thuc va, truc va, tuc xa
xuc va » duc va, luc va, xac va

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: te sach ky lang xa hoi. hieu van cam ((xuc va) OR (tuc va)) dung sai ((ve triet) OR (cua cu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu van cam ((xuc va) OR (tuc va)) dung sai ((ve triet) or (cua cu))~".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu van cam ((xuc va) OR (tuc va)) dung sai ((ve triet) or (cua cu))*.