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
cau treo » cau theo, cau triet, cau trieu
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ly hang » ly quang
hang xa » hoang xa, hang va, hang ca
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: su sach ly hang xa hoi. hieu van cam thuc va danh hai ((cau treo) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly hang xa hoi. hieu van cam thuc va danh hai ((cau treo) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: su sach ly hang xa hoi. hieu van cam thuc va danh hai ((cau treo) or (cau tren))*.