Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
ban thanh » ban hanh, ban hang
kho tang » cao tang
van cua » vang cua, ban cua, dan cua
luc ban » duc ban, cuc ban, luc bat
vu sach » vu bach, su sach, vu khach
van cam » van lam, van cau, van dam
ky tang » ky nang, ky dang, ky trong
cua tre » cua te, cuu tre, cua triet

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: vu sach ((ky tang) OR (kho tang)) xa hoi. hieu ((van cam) OR (van nam)) luc ban thanh van cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ky tang) OR (kho tang)) xa hoi. hieu ((van cam) or (van nam)) luc ban thanh van cua tre~".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ky tang) OR (kho tang)) xa hoi. hieu ((van cam) or (van nam)) luc ban thanh van cua tre*.