Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
lam quoc » lam duoc, nam quoc, lam thuoc
quoc lan » quoc ban, nuoc luan, quoc quan
lan benh » san benh, can benh, doan benh
te sach » toc sach
van lam » van nam
benh vi » benh va, benh ve, benh li
cua tre » cua te, cuu tre, dua tren
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land

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: te sach ((y lang) OR (_ lang)) xa hoi. hieu van lam quoc lan benh vi ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y lang) OR (_ lang)) xa hoi. hieu van lam quoc lan benh vi ((cua tre) or (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: te sach ((y lang) OR (_ lang)) xa hoi. hieu van lam quoc lan benh vi ((cua tre) or (cua triet))*.