Perhaps you should try some spelling variations:
van dinh » van minh, van dich, va dinh
te sach » toc sach
vu dinh » quy dinh
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
sach tu » sach thu, cach tu, sach ty
vi cua » vai cua, di cua
co xua » co cua, bo xua, cao xuan
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tu nang xa hoi. ((hieu va) or (hieu qua)) co xua ((vu dinh) or (van dinh)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang xa hoi. ((hieu va) OR (hieu qua)) co xua ((vu dinh) OR (van dinh)) vi cua tu.
• Adding a wildcard symbol may retrieve word variants: te sach tu nang xa hoi. ((hieu va) or (hieu qua)) co xua ((vu dinh) or (van dinh)) vi cua tu*.