Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
cau treo » cau theo, cau tren, cau triet
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
nam dua » nam da, nam mua, nam qua
tai cau » tai cac, tai cao
y nang » ky nang, ly nang, v nang

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 y nang ((mai hoi) or (ma hoa)). hieu van ((nam dua) or (nam cua)) ban thanh tai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((mai hoi) OR (ma hoa)). hieu van ((nam dua) OR (nam cua)) ban thanh tai cau treo.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((mai hoi) or (ma hoa)). hieu van ((nam dua) or (nam cua)) ban thanh tai cau treo*.