Perhaps you should try some spelling variations:
sang tao » hang tai
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
sang ma » tang ma, nang ma, mang may
hieu va » lieu va, hieu qua
va cham » va chat, va tham
duc van » duc va, duc manh, duc phan
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 ((sang ma) OR (sang tao)) hoi. hieu va cham ((duc van) or (duc tan)) thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((sang ma) OR (sang tao)) hoi. hieu va cham ((duc van) OR (duc tan)) thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((sang ma) OR (sang tao)) hoi. hieu va cham ((duc van) or (duc tan)) thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach y ((sang ma) OR (sang tao)) hoi. hieu va cham ((duc van) or (duc tan)) thanh vi cua tre*.