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
va nang » van nang, da nang, cam nang
va lang » hoa lang
van lam » van nam
ty hang » ly hang, ty xang, thi hang
ty lang » tay lang, ty xang, tu lang
va cua » va chua, via cua, ca cua
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 lang) or (va nang)) va 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 lang) OR (va nang)) va 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 lang) or (va nang)) va cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty lang) OR (ty hang)) xa hoi. hieu van lam duoc ((va lang) or (va nang)) va cua te*.