Perhaps you should try some spelling variations:
vu sach » vu bach, vu khach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
su sach » so sach
cua tre » cua te, cuu tre, cua triet
soc va » hoc va, loc va, doc va
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: ((vu sach) OR (su sach)) lo ((nang xa) or (nang ma)) hoi. hieu vu cham soc va danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) lo ((nang xa) OR (nang ma)) hoi. hieu vu cham soc va danh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (su sach)) lo ((nang xa) or (nang ma)) hoi. hieu vu cham soc va danh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (su sach)) lo ((nang xa) or (nang ma)) hoi. hieu vu cham soc va danh vi cua tre*.