Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
va thanh » gia thanh, ban thanh, va tinh
cham luc » cham soc, nhan luc, cham cuu
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau tren, cau treo
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
va khai » van khai, va khao, va kha
ky hang » ky nang, ly hang, ky dang
luc va » duc va, tuc va, loc va
va hai » van hai, va chai, va bai
cua te » cua tu

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 hang ((va hai) OR (va khai)). hieu ve cham luc va thanh hai ((cuu tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky hang ((va hai) OR (va khai)). hieu ve cham luc va thanh hai ((cuu tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky hang ((va hai) OR (va khai)). hieu ve cham luc va thanh hai ((cuu tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sach ky hang ((va hai) OR (va khai)). hieu ve cham luc va thanh hai ((cuu tre) or (cua te))*.