Perhaps you should try some spelling variations:
chau treo » cau treo, cau theo, chau tho
hieu van » hieu va, thien van, lieu va
hai chau » lai chau, ha chau, hat chau
danh hai » dang hai, lanh hai, manh hai
nang mai » nang ma, lang mai, nang cai
cam thuc » am thuc, nam thuc, cam thu
nang tai » hang tai, tang tai, sang tai
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
van cam » van nam, van lam, van cau
sach ly » sach lo, sach ty, sach hay

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