Perhaps you should try some spelling variations:
ban xanh » ban hanh, ban anh, ban banh
quoc ban » quoc bao, quoc lan, quoc quan
cua tre » cua te, cuu tre, cua triet
xanh di » danh di, vanh dai, xanh tai
va cham » va chat, va tham
ve cham » ve chat, vu cham, ve chim
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
ma hoi » xa hoi, ma hoa, me hoi
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 ((ma hoi) or (mai hoi)). hieu ((ve cham) OR (va cham)) quoc ban xanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky sang ((ma hoi) OR (mai hoi)). hieu ((ve cham) OR (va cham)) quoc ban xanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky sang ((ma hoi) or (mai hoi)). hieu ((ve cham) OR (va cham)) quoc ban xanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ((ma hoi) or (mai hoi)). hieu ((ve cham) OR (va cham)) quoc ban xanh di cua tre*.