Perhaps you should try some spelling variations:
phan thanh » pham thanh, ban thanh, van thanh
thanh cuu » thanh luu, thanh chu, thanh tuu
van phan » van phong, van thanh, luan phan
vien cac » vien bach, vien dai, vien da
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
xuc van » duc van, luc van, vuc van
cuu tre » cua tre, cau tren, cau treo
ve cac » va cac
so ha » so hoa, so va
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: su sach ky nang ((o hoi) or (so ha)). hieu ((ve cac) or (vien cac)) xuc van phan thanh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((o hoi) OR (so ha)). hieu ((ve cac) OR (vien cac)) xuc van phan thanh cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((o hoi) or (so ha)). hieu ((ve cac) or (vien cac)) xuc van phan thanh cuu tre*.