Perhaps you should try some spelling variations:
chu treo » cau treo, cu tren, cau tren
danh hai » dang hai, lanh hai, manh hai
lam thuc » lam thuoc, am thuc, nam thuc
hieu van » hieu va, thien van, lieu va
sach hay » sach han, sach ha, sach nay
hai chu » hai chau, hoi chu, hai chi
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
van lam » van nam
sach ty » sach y, sach tu, sach thu
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach hay) or (sach ty)) sang ((ma hoi) or (xa hoi)). hieu van lam thuc va danh hai chu treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach hay) OR (sach ty)) sang ((ma hoi) OR (xa hoi)). hieu van lam thuc va danh hai chu treo.
• Adding a wildcard symbol may retrieve word variants: su ((sach hay) or (sach ty)) sang ((ma hoi) or (xa hoi)). hieu van lam thuc va danh hai chu treo*.