Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
su sach » so sach, vu sach
mang xa » mang may, dang xay, mang cua
lang xa » lang ha, dang xay, lang van
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y ((((mang xa) or (lang xa))) or (nang ma)) hoi. hieu ve cham duc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((((mang xa) OR (lang xa))) OR (nang ma)) hoi. hieu ve cham duc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach y ((((mang xa) or (lang xa))) or (nang ma)) hoi. hieu ve cham duc va hanh vi cua tre*.