Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
lam thuc » lam thuoc, am thuc, nam thuc
thuc dan » thuc hanh, hoc dan, thuc vat
dan canh » van canh, dan cach, dan hanh
canh hai » lanh hai, manh hai, can hai
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
van lam » van nam
hai cau » hai chau, hai chu, hai hau
ma hoi » mai hoi, ma hoa, me 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 nang ((ma hoi) or (xa hoi)). hieu van lam thuc dan canh hai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang ((ma hoi) OR (xa hoi)). hieu van lam thuc dan canh hai cau tren.
• Adding a wildcard symbol may retrieve word variants: su sach ly nang ((ma hoi) or (xa hoi)). hieu van lam thuc dan canh hai cau tren*.