Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh tuc » thanh tu, thanh tuu, thanh tung
hieu van » hieu va, thien van, lieu va
danh tai » doanh tai, dinh tai, hanh tai
tai cua » thai cua, tai cuc, tri cua
va danh » va dinh, va dan, va hanh
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
v nang » va nang, vu nang, van nang
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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) OR (su sach)) v nang ((xa hoi) OR (ma hoa)). hieu van thanh tuc va danh tai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) v nang ((xa hoi) or (ma hoa)). hieu van thanh tuc va danh tai cua te~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) v nang ((xa hoi) or (ma hoa)). hieu van thanh tuc va danh tai cua te*.