Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh hoi » thanh hoai, thanh hoa, thanh hai
thu sach » tu sach, thuat sach, thuoc sach
dua ban » dia ban, cua ban, qua ban
cua tre » cua te, cua triet, dua tren
ve cach » va cach, ve canh
cuu tre » cau tren, cau treo
ve cac » va cac, vien cac
y nang » ky nang, ly nang, v nang
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: thu sach y nang x hoi. hieu ((ve cach) or (ve cac)) dua ban thanh hoi ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. hieu ((ve cach) OR (ve cac)) dua ban thanh hoi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. hieu ((ve cach) or (ve cac)) dua ban thanh hoi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. hieu ((ve cach) or (ve cac)) dua ban thanh hoi ((cua tre) OR (cuu tre))*.