Perhaps you should try some spelling variations:
luoc can » luc canh, hoc can, luoc dai
dang mau » dong mau, dang van, dang su
cua tre » cua te, cuu tre, cua triet
ky dang » ky nang, ky danh
mau hoi » cau hoi, mai hoi, mau ho
hieu ve » hieu van
hieu va » lieu va, hieu qua
duc van » duc va, duc tan, duc manh
vi cua » vai cua, di cua
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te san ky dang mau hoi. ((hieu ve) or (hieu va)) cac ((duc van) or (luoc can)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ky dang mau hoi. ((hieu ve) OR (hieu va)) cac ((duc van) OR (luoc can)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te san ky dang mau hoi. ((hieu ve) or (hieu va)) cac ((duc van) or (luoc can)) hanh vi cua tre*.