Perhaps you should try some spelling variations:
lam duoc » nam duoc, luat duoc, lam thuoc
hieu van » hieu va, thien van, lieu va
va nang » van nang, da nang, cam nang
va hang » van hang, va lang, va hanh
te sach » toc sach
van lam » van nam
ty lang » tay lang, ty hang, tu lang
va cua » va chua, via cua, ca cua
cua tu » cua tuc, cua su, cua cu

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 xang)) xa hoi. hieu van lam duoc ((va hang) or (va nang)) va cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty lang) OR (ty xang)) xa hoi. hieu van lam duoc ((va hang) OR (va nang)) va cua tu.
• Adding a wildcard symbol may retrieve word variants: te sach ((ty lang) or (ty xang)) xa hoi. hieu van lam duoc ((va hang) or (va nang)) va cua tu*.