Perhaps you should try some spelling variations:
quoc lan » quoc ban, nuoc luan, quoc quan
van cham » van chat, va cham, van pham
van tham » van thanh, van tuan, van chat
cua tre » cua te, cuu tre, cua triet
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
xuc ban » duc ban, cuc ban, quoc ban
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san
ma hoi » mai hoi, xa hoi, ma hoa
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 ma hoi. hieu ((van cham) OR (van tham)) ((xuc ban) OR (quoc lan)) hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky tang ma hoi. hieu ((van cham) OR (van tham)) ((xuc ban) or (quoc lan)) hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky tang ma hoi. hieu ((van cham) OR (van tham)) ((xuc ban) or (quoc lan)) hanh vi cua tre*.