Perhaps you should try some spelling variations:
sach tri » sach tai, sach tren, sach truc
tri nang » thi nang, tra nang, tri bang
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
van lam » van nam
lam cuc » lam cua, lam duoc, pham cuc
cuc ban » cua ban, cac ban, cuu ban
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua

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 tri nang ma hoi. hieu van lam cuc ban hanh ((di cua) OR (de cua)) tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach tri nang ma hoi. hieu van lam cuc ban hanh ((di cua) or (de cua)) tre*.