Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
nam thuc » nam thuoc, am thuc, nam thu
thuc ban » thuoc ban, thuc dan, thu ban
thanh vi » hanh vi, thanh va, thanh ve
cau treo » cau theo, cau tren, cau triet
su sach » so sach, vu sach
thi van » thi lan, thi hanh, thi nang
y nang » ky nang, ly nang, v nang
vi cau » va cau, ve cau, di cau
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang x hoi. ((lieu va) or (((thien van) or (thi van)))) nam thuc ban thanh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. ((lieu va) OR (((thien van) OR (thi van)))) nam thuc ban thanh vi cau treo.
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. ((lieu va) or (((thien van) or (thi van)))) nam thuc ban thanh vi cau treo*.