Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, hieu ve
ban hang » ngan hang
hang hai » hoang hai, hang tai, thanh hai
cau treo » cau theo, cau tren, cau triet
mai hoi » mai khoi, dai hoi, lai hoi
nam mua » nam cua, nam qua, nam xua
mua ban » cua ban, qua ban
hai cau » hai chau, hai chu, hai hau
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: thu sach y nang ((mai hoi) or (ma hoa)). ((hieu van) or (lieu va)) nam mua ban hang hai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((mai hoi) OR (ma hoa)). ((hieu van) OR (lieu va)) nam mua ban hang hai cau treo.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((mai hoi) or (ma hoa)). ((hieu van) or (lieu va)) nam mua ban hang hai cau treo*.