Perhaps you should try some spelling variations:
cham quoc » chuan quoc, han quoc, cua quoc
ban xanh » ban hanh, ban anh, ban banh
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
xanh de » hanh de, xanh di, thanh de
sang xa » song xa, lang xa, sang ma
hieu ve » hieu van
ky sang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
de cua » le cua, te cua, dieu cua
tu sac » tu sach, tu cac, tu san

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 sang xa hoi. ((hieu ve) OR (hieu va)) ((cham quoc) OR (cham soc)) ban xanh de cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky sang xa hoi. ((hieu ve) or (hieu va)) ((cham quoc) OR (cham soc)) ban xanh de cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang xa hoi. ((hieu ve) or (hieu va)) ((cham quoc) OR (cham soc)) ban xanh de cua tre*.