Perhaps you should try some spelling variations:
thanh than » thanh thanh, thanh thang, thanh toan
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thuoc sach
vien cac » vien bach, vien dai, vien da
than cua » nhan cua, thai cua, ban cua
xuc van » duc van, luc van, xuc ban
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
ve cac » va cac
co hoi » co hoc, co loi
o hoi » o hoc, o hai, o hoa

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 ((o hoi) OR (co hoi)). hieu ((ve cac) or (vien cac)) xuc van thanh than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((o hoi) OR (co hoi)). hieu ((ve cac) OR (vien cac)) xuc van thanh than cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ((o hoi) OR (co hoi)). hieu ((ve cac) or (vien cac)) xuc van thanh than cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((o hoi) OR (co hoi)). hieu ((ve cac) or (vien cac)) xuc van thanh than cua tre*.