Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hoc anh » hoc nganh, hoc nhanh, ngoc anh
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
vi cua » vai cua, di cua
va cao » va co, va dao, va bao
v nang » va nang, vu nang, van nang
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (hoc anh)) v nang x hoi. hieu ((va cao) or (va cac)) thuc va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc anh)) v nang x hoi. hieu ((va cao) OR (va cac)) thuc va danh vi cua te.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc anh)) v nang x hoi. hieu ((va cao) or (va cac)) thuc va danh vi cua te*.