Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
va tham » van tham, va thuat
sach tu » sach thu, cach tu, sach ty
va cham » va chat
hang ca » hang va, nang cao, hang tai
hang ma » hang va, tang ma, nang ma
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc 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: su sach tu ((hang ma) or (hang ca)) hoi. hieu ((va cham) OR (va tham)) xuc va thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu ((hang ma) OR (hang ca)) hoi. hieu ((va cham) OR (va tham)) xuc va thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tu ((hang ma) or (hang ca)) hoi. hieu ((va cham) OR (va tham)) xuc va thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach tu ((hang ma) or (hang ca)) hoi. hieu ((va cham) OR (va tham)) xuc va thanh vi cua tre*.