Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
nam duoc » nam thuoc, da duoc, dat duoc
va thanh » ban thanh, va tinh, le thanh
cuu tre » cua tre, cau tren, cau treo
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
di cuu » di cau, di cua, dinh cuu
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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 tang xa hoi. ((hieu van) OR (hieu va)) nam duoc ((va thanh) OR (gia thanh)) di cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky tang xa hoi. ((hieu van) OR (hieu va)) nam duoc ((va thanh) or (gia thanh)) di cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky tang xa hoi. ((hieu van) OR (hieu va)) nam duoc ((va thanh) or (gia thanh)) di cuu tre*.