Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cam thuc » am thuc, nam thuc, cam thu
danh hai » dang hai, lanh hai, manh hai
hau treo » cau theo, dau tren, cau tren
cau treo » cau theo, cau tren, cau triet
so sach » so sanh, bo sach, co sach
sach ho » sach hoi, sach ha, sach lo
ho nang » thi nang, kha nang, cao nang
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ho nang xa hoi. hieu van cam thuc va danh hai ((hau treo) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ho nang xa hoi. hieu van cam thuc va danh hai ((hau treo) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: so sach ho nang xa hoi. hieu van cam thuc va danh hai ((hau treo) or (cau treo))*.