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

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky sang xa hoi. ((hieu ve) or (hieu va)) cham quoc ((ban xanh) OR (ban banh)) di cua tre~.
• 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 ((ban xanh) OR (ban banh)) di 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 ((ban xanh) OR (ban banh)) di cua tre*".