Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
te sach » toc sach
lam duc » lam duoc, pham duc, nam duoc
hoi cua » hoi chuc
hai cua » thai cua, dai cua, lai cua
duc ban » duc tan, duc van, dua ban
van lam » van nam
may hoi » may thoi, tay hoi, mai hoi
ky mang » ky nang, ke mang, ky dang
vu sach » vu bach, su sach, vu khach

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) or (vu sach)) ky mang may hoi. hieu van lam duc ban thanh ((hai cua) or (hoi cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (vu sach)) ky mang may hoi. hieu van lam duc ban thanh ((hai cua) OR (hoi cua)) tu.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (vu sach)) ky mang may hoi. hieu van lam duc ban thanh ((hai cua) or (hoi cua)) tu*.