Perhaps you should try some spelling variations:
hau treo » cau treo, cau theo, dau tren
danh hai » dang hai, lanh hai, manh hai
cam thuc » am thuc, nam thuc, cam thu
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
hai hau » hai chau, dai hau, hai hai
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 y, sach lo, sach hay
sach tu » sach thu, cach tu, sach uu
sach ty » sach y, sach thu, xach tay
mai hoi » mai khoi, dai hoi, lai 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 ly) or (((sach ty) or (sach tu)))) nang mai hoi. hieu van cam thuc va danh hai hau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ly) OR (((sach ty) OR (sach tu)))) nang mai hoi. hieu van cam thuc va danh hai hau treo.
• Adding a wildcard symbol may retrieve word variants: su ((sach ly) or (((sach ty) or (sach tu)))) nang mai hoi. hieu van cam thuc va danh hai hau treo*.