Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
truc may » tren may, truc va
dang xay » dang van, van xay
su triet » su tien, ve triet
dinh ve » dinh ket, dinh van
su viet » so viet
xuc may » xuc hay, phuc may
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
y dang » ky dang, 2 dang, _ dang
va cam » va cham, va cac, va cao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y dang xay hoi. hieu va cam ((xuc may) or (truc may)) dinh ve ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y dang xay hoi. hieu va cam ((xuc may) OR (truc may)) dinh ve ((su triet) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: toc sach y dang xay hoi. hieu va cam ((xuc may) or (truc may)) dinh ve ((su triet) or (su viet))*.