Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
ban banh » ban hanh, ban anh, ban danh
tu sach » thu sach, su sach, te sach
banh vi » hanh vi, ban vi, benh vi
xuc ban » duc ban, cuc ban, quoc ban
qua cac » cua cac
cua tre » cua te, cuu tre, cua triet
qua cam » qua cham, qua ca, qua cai
nang ma » tang ma, sang ma, nang cao
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: tu sach thu ((nang x) or (nang ma)) hoi. hieu ((qua cam) OR (qua cac)) xuc ban banh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu ((nang x) OR (nang ma)) hoi. hieu ((qua cam) OR (qua cac)) xuc ban banh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu ((nang x) or (nang ma)) hoi. hieu ((qua cam) OR (qua cac)) xuc ban banh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach thu ((nang x) or (nang ma)) hoi. hieu ((qua cam) OR (qua cac)) xuc ban banh vi cua tre*.