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
te sach » toc sach
lang xa » lang ha, dang xay, lang van
van lam » van nam
quoc co » quoc cao, quoc cho, duoc co
co benh » con benh, so benh, o benh
benh ve » benh va, benh vien, benh viem
cua tre » cua te, cuu tre, dua tren
y lang » o lang, _ lang, tay lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y lang xa hoi. hieu van lam quoc co benh ve ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y lang xa hoi. hieu van lam quoc co benh ve ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: te sach y lang xa hoi. hieu van lam quoc co benh ve ((cua tre) or (cua triet))*.