Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
chat xuc » chat huu, cam xuc, chao xu
sach ky » sac ky, sach y, sach ty
tien va » dien va, thien van
vien va » dien va, vien da, viec va
xuc ban » duc ban, cuc ban, quoc ban
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
hoc hoi » hoc khoi, hoc hoa, hoc noi
ky tang » ky nang, ky dang, kho tang
ve chat » va chat, van chat
ho hoi » hoa hoi, hoi hoi, co hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky tang ((ho hoi) OR (hoc hoi)). hieu ve chat xuc ban thanh ((vien va) or (tien va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang ((ho hoi) OR (hoc hoi)). hieu ve chat xuc ban thanh ((vien va) OR (tien va)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang ((ho hoi) OR (hoc hoi)). hieu ve chat xuc ban thanh ((vien va) or (tien va)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang ((ho hoi) OR (hoc hoi)). hieu ve chat xuc ban thanh ((vien va) or (tien va)) triet*.