Perhaps you should try some spelling variations:
thanh luc » thanh luu, than luc, nhan luc
van thanh » ban thanh, van tuan
hieu van » hieu va, thien van, lieu va
vu sach » vu bach, su sach, vu khach
tu sach » thu sach, su sach, te sach
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (tu sach)) ky nang ((x hoi) or (x ho)). hieu van thanh luc va danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (tu sach)) ky nang ((x hoi) OR (x ho)). hieu van thanh luc va danh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (tu sach)) ky nang ((x hoi) or (x ho)). hieu van thanh luc va danh vi cua tre*.