Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh lai » thanh hai, thanh lap, thanh loi
toc sach » hoc sach, doc sach, thuoc sach
dua tren » dung tren
pham dua » pham duc, pham duy, pham cua
cau treo » cau theo, cau tren, cau triet
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
dua ban » dia ban, cua ban, qua ban
y nang » ly nang, v nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((y nang) or (ky nang)) ma hoi. hieu ve pham dua ban thanh lai ((dua tren) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((y nang) OR (ky nang)) ma hoi. hieu ve pham dua ban thanh lai ((dua tren) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: toc sach ((y nang) or (ky nang)) ma hoi. hieu ve pham dua ban thanh lai ((dua tren) or (cau treo))*.