Perhaps you should try some spelling variations:
dong mau » dong ma, dang mau, dong ha
va thanh » ban thanh, va tinh, le thanh
cua tre » cua te, cuu tre, cua triet
cam luc » cam xuc, cau luc
hai cua » thai cua, dai cua, hoi cua
hieu va » lieu va, hieu qua
hieu ve » hieu van
mau hoi » cau hoi, mai hoi, mau ho
ky dong » ly dong, ky dang, ky cong
sac ky » cac ky, sai ky
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 dong mau hoi. ((hieu ve) OR (hieu va)) cam luc ((va thanh) or (gia thanh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dong mau hoi. ((hieu ve) OR (hieu va)) cam luc ((va thanh) OR (gia thanh)) hai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dong mau hoi. ((hieu ve) OR (hieu va)) cam luc ((va thanh) or (gia thanh)) hai cua tre*".