Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh hai » thanh phan, thanh hoa, thanh san
cau treo » cau theo, cau tren, cau triet
hieu van » hieu va, thien van, lieu va
cuu tre » cua tre, cau tren
thu san » thuy san, thu ban, phu san
dua ban » dia ban, cua ban, qua ban
mai hoi » mai khoi, dai hoi, lai hoi
nam dua » nam da, nam cua, nam mua
san ky » sang ky, van ky, dan ky

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu san ky nang ((mai hoi) or (ma hoa)). hieu van nam dua ban thanh hai ((cuu tre) OR (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu san ky nang ((mai hoi) OR (ma hoa)). hieu van nam dua ban thanh hai ((cuu tre) OR (cau treo))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu san ky nang ((mai hoi) or (ma hoa)). hieu van nam dua ban thanh hai ((cuu tre) OR (cau treo))*".