Perhaps you should try some spelling variations:
nam truong » nam trong, nam trung, lam truong
truong va » truong dai, truong cao, truong dao
hieu van » hieu va, thien van, lieu va
cua viet » ca viet, hoa viet, cua vat
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
sach v » sach va, sach y, sach vay
sach 2 » sach y
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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: su ((sach v) OR (sach 2)) nang x hoi. hieu van nam truong va danh vi cua viet~.
• Adding a wildcard symbol may retrieve word variants: su ((sach v) or (sach 2)) nang x hoi. hieu van nam truong va danh vi cua viet*.