Perhaps you should try some spelling variations:
luoc can » luc canh, hoc can, luoc dai
cuu tre » cua tre, cau tren, cau treo
duc van » duc va, duc tan, duc manh
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac
te ban » te bao
vi cuu » vi luu, vinh cuu
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) or (te ban)) ky tang ma hoi. hieu ve cac ((duc van) or (luoc can)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te ban)) ky tang ma hoi. hieu ve cac ((duc van) OR (luoc can)) hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te ban)) ky tang ma hoi. hieu ve cac ((duc van) or (luoc can)) hanh vi cuu tre*.