Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
danh hai » dang hai, lanh hai, manh hai
cau treo » cau theo, cau tren, cau triet
sach lo » sach dao, sach doi, sach hoi
sach ty » sach tu, sach thu, xach tay
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
hai cau » hai chau, hai chu, hai hau

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 y) or (sach lo))) or (sach ty)) nang xa hoi. hieu van nam thuc va danh hai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((((sach y) OR (sach lo))) OR (sach ty)) nang xa hoi. hieu van nam thuc va danh hai cau treo.
• Adding a wildcard symbol may retrieve word variants: su ((((sach y) or (sach lo))) or (sach ty)) nang xa hoi. hieu van nam thuc va danh hai cau treo*.