Perhaps you should try some spelling variations:
van dinh » van minh, van dich, va dinh
nang xa » nang x, lang xa, nang ma
hieu vu » hieu ve, hieu su, dieu vu
hieu va » lieu va, hieu qua
soc van » hoc van, oc van, sac van
dinh ve » dinh ket, dinh van
cuu tre » cua tre, cau tren, cau treo
sac ky » sai ky
ve cuu » ve cau, ve chu, ve cua

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 ((sac ky) OR (cac ky)) nang xa hoi. ((hieu vu) OR (hieu va)) cham soc van dinh ve cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) OR (cac ky)) nang xa hoi. ((hieu vu) or (hieu va)) cham soc van dinh ve cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) OR (cac ky)) nang xa hoi. ((hieu vu) or (hieu va)) cham soc van dinh ve cuu tre*.