Perhaps you should try some spelling variations:
cua triet » su triet, va triet
thanh kho » thanh pho, thanh ho, thanh thao
van thanh » ban thanh, van tuan
cua viet » ca viet, hoa viet, cua vat
xuc van » duc van, luc van, vuc van
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
y nang » ky nang, ly nang, v nang
so hoc » co hoc, mo hoc, so hoa
o hoc » co hoc, mo hoc, y hoc

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((o hoc) OR (so hoc)). hieu va cam xuc van thanh kho ((cua triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ((o hoc) or (so hoc)). hieu va cam xuc van thanh kho ((cua triet) OR (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((o hoc) or (so hoc)). hieu va cam xuc van thanh kho ((cua triet) OR (cua viet))*.