Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, le thanh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
va tinh » may tinh
hieu va » lieu va, hieu qua
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san
cam tu » cam thu, nam tu, dam tu
sac ky » cac ky, sai ky
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: tu sac ky nang x hoi. ((hieu ve) OR (hieu va)) cam tu ((va thanh) OR (va tinh)) vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang x hoi. ((hieu ve) OR (hieu va)) cam tu ((va thanh) or (va tinh)) vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang x hoi. ((hieu ve) OR (hieu va)) cam tu ((va thanh) or (va tinh)) vi cua tre*.