Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
nhu hien » thu hien, thuc hien, thi hien
sach van » sach han, sach va, bach van
van tang » van thang, van trang, van nang
thanh vi » hanh vi, thanh va, thanh ve
thuc dan » thuc hanh, hoc dan, thuc vat
cam thuc » am thuc, nam thuc, cam thu
hieu van » hieu va, thien van, lieu va
su tien » su kien, su hien, tu tieng
te sach » toc sach
hieu ve » hieu va
tang ma » mang may, tang van
ma hoi » mai hoi, xa hoi, ma hoa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach van tang ma hoi. ((hieu ve) OR (hieu van)) cam thuc dan thanh vi ((su tien) OR (nhu hien))~.
• Adding a wildcard symbol may retrieve word variants: te sach van tang ma hoi. ((hieu ve) or (hieu van)) cam thuc dan thanh vi ((su tien) or (nhu hien))*.