Perhaps you should try some spelling variations:
chu viet » che viet, khau viet, su viet
hieu van » hieu va, thien van, lieu va
hanh lai » hanh lam, hanh tai, thanh lap
thuc dan » thuc hanh, hoc dan, thuc vat
van nham » van nam, van nhan, van tham
thu bang » thu hang, chu bang, thu trang
thu ban » thu hang
thuc va » thuc vat, thuc day
lai chu » lai chau, lam chu, lai cho
vu sach » vu bach, su sach, vu khach
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((thu bang) or (thu ban)) x hoi. hieu van nham ((thuc va) or (thuc dan)) hanh lai chu viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((thu bang) OR (thu ban)) x hoi. hieu van nham ((thuc va) OR (thuc dan)) hanh lai chu viet.
• Adding a wildcard symbol may retrieve word variants: vu sach ((thu bang) or (thu ban)) x hoi. hieu van nham ((thuc va) or (thuc dan)) hanh lai chu viet*.