Perhaps you should try some spelling variations:
hinh dieu » vinh dieu, dinh dieu, hanh dieu
thuc van » thuc vat, thuc va, thuc hanh
thuc dan » thuc hanh, hoc dan, thuc vat
dieu tra » dieu tri, kiem tra, dieu cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
tra tre » tran tren, tran tri, tran tro
va cau » van cau, va cac, va dau

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 ky nang xa hoi. hieu va cau ((thuc van) OR (thuc dan)) hinh dieu tra tre~.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu va cau ((thuc van) or (thuc dan)) hinh dieu tra tre*.