Perhaps you should try some spelling variations:
chanh niem » thanh liem, thanh nien
thien van » thi van
niem cua » nhiem cua, niem chua, diem cua
dang mai » dang hai, dang mau, dang bai
va chanh » va thanh, va chinh, va hanh
cham cuu » cap cuu, chat cua
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky dang » ky nang, ky danh
sac ky » cac ky, sai ky
cuu va » cuu van, cuu ve
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky dang mai hoi. ((hieu ve) or (thien van)) cham cuu va chanh niem cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky dang mai hoi. ((hieu ve) OR (thien van)) cham cuu va chanh niem cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky dang mai hoi. ((hieu ve) or (thien van)) cham cuu va chanh niem cua tre*.