Perhaps you should try some spelling variations:
van dinh » van minh, van dich, va dinh
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
van cua » vang cua, ban cua, dan cua
sac ky » cac ky, sai ky
xu van » tu van, vu van, su van
cua te » cua tu

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: tu ((sach ky) OR (sac ky)) nang xa hoi. ((hieu va) OR (hieu qua)) chao xu van dinh van cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sac ky)) nang xa hoi. ((hieu va) OR (hieu qua)) chao xu van dinh van cua te~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang xa hoi. ((hieu va) OR (hieu qua)) chao xu van dinh van cua te*.