Perhaps you should try some spelling variations:
sach van » sach han, sach va, bach van
van nang » van quang, van ban, van dong
hieu van » thien van, lieu va, hieu ve
cay thuc » cay thuoc, can thuc, day thuc
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
ma hoi » mai hoi, xa hoi, ma hoa
vi tan » vi than, vi toan, vi van
trieu » thieu, trien, tieu

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 nang ma hoi. ((hieu van) OR (hieu va)) cay thuc va danh vi tan trieu~.
• Adding a wildcard symbol may retrieve word variants: te sach van nang ma hoi. ((hieu van) or (hieu va)) cay thuc va danh vi tan trieu*.