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
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
van lam » van nam
cuc ban » cac ban, cuu ban, duc ban
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de 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: su sach tri nang xa hoi. hieu van lam ((cuc ban) OR (cua ban)) hanh di cua tre~.
• Adding a wildcard symbol may retrieve word variants: su sach tri nang xa hoi. hieu van lam ((cuc ban) or (cua ban)) hanh di cua tre*.