Perhaps you should try some spelling variations:
lam duoc » nam duoc, luat duoc, lam thuoc
hieu van » hieu va, thien van, lieu va
te sach » toc sach
cua tre » cuu tre, cua triet, dua tren
hang vi » hang va, hanh vi, hang di
va hang » van hang, va nang, va lang
duoc va » nuoc va, duc va, duoc ma
van lam » van nam
ty hang » ly hang, ty xang, thi hang
ty lang » tay lang, ty xang, tu lang
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: te sach ((ty lang) or (ty hang)) xa hoi. hieu van lam duoc va hang vi ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty lang) OR (ty hang)) xa hoi. hieu van lam duoc va hang vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty lang) or (ty hang)) xa hoi. hieu van lam duoc va hang vi ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty lang) or (ty hang)) xa hoi. hieu van lam duoc va hang vi ((cua tre) OR (cua te))*.