Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh hai » thanh phan, thanh hoa, thanh san
thu nang » thi nang, thu hang, thu bang
nang mai » nang ma, nang tai, lang mai
sach thu » sach thue, sach thieu, sach tham
su sach » so sach, vu sach
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
dua ban » dia ban, cua ban, qua ban
van cam » van lam, van cau, van dam
mai hoi » mai khoi, dai hoi, lai hoi

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 thu nang mai hoi. hieu ((van cam) or (van nam)) dua ban thanh hai ((cuu tre) OR (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu nang mai hoi. hieu ((van cam) OR (van nam)) dua ban thanh hai ((cuu tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thu nang mai hoi. hieu ((van cam) or (van nam)) dua ban thanh hai ((cuu tre) OR (cua tre))".
• Adding a wildcard symbol may retrieve word variants: su sach thu nang mai hoi. hieu ((van cam) or (van nam)) dua ban thanh hai ((cuu tre) OR (cua tre))*.