Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
hieu van » hieu va, thien van, lieu va
van nham » van nam, van nhan, van tham
su sach » so sach, vu sach
va danh » va dinh, dia danh, va thanh
va hanh » van hanh, va thanh, ban hanh
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
va dan » ca dan, va dao, va dau
vi cua » vai cua, di cua
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: su sach v nang x hoi. hieu van nham thuc ((va hanh) or (((va danh) OR (va dan)))) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang x hoi. hieu van nham thuc ((va hanh) OR (((va danh) OR (va dan)))) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang x hoi. hieu van nham thuc ((va hanh) or (((va danh) OR (va dan)))) vi cua te".
• Adding a wildcard symbol may retrieve word variants: su sach v nang x hoi. hieu van nham thuc ((va hanh) or (((va danh) OR (va dan)))) vi cua te*.