Perhaps you should try some spelling variations:
cham hoc » cham soc, chat hoc, cham hoi
bao xanh » bao hanh, ban hanh, dao hanh
hoc bao » hoc cao, hoc bai, hoc bo
cua tre » cua te, cua triet, dua tren
xanh di » danh di, vanh dai, xanh tai
cuu tre » cau tren, cau treo
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
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 dang ma hoi. hieu ve cham hoc bao xanh di ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang ma hoi. hieu ve cham hoc bao xanh di ((cua tre) OR (cuu tre))*.