Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thu sach » tu sach, thuat sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
van cua » vang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
o hoi » co hoi, o hoc, o hai

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

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