Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
lam duoc » nam duoc, luat duoc, lam thuoc
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
van lam » van nam
va hanh » van hanh, va thanh, va danh
va nang » van nang, da nang, cam nang
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua

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