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 vai » hang va, hang tai, hang hai
cau dua » cau qua, cau cua, ca dua
dua ban » dia ban, cua ban, qua ban
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi

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 ((ma hoi) or (ma hoa)). ((hieu van) OR (lieu va)) cau dua ban hang vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((ma hoi) OR (ma hoa)). ((hieu van) OR (lieu va)) cau dua ban hang vai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang ((ma hoi) or (ma hoa)). ((hieu van) OR (lieu va)) cau dua ban hang vai cuu tre*".