Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc anh
cham duc » pham duc, cham soc, pham duy
va triet » va thiet, va trien, ve triet
hoc cac » hoc cao
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc cac)) ky nang ma hoi. hieu va cham duc va hanh vi ((cua te) OR (va triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc cac)) ky nang ma hoi. hieu va cham duc va hanh vi ((cua te) or (va triet))~".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) OR (hoc cac)) ky nang ma hoi. hieu va cham duc va hanh vi ((cua te) or (va triet))*.