Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
nang dai » nang dau, nang tai, lang dai
thai cua » than cua, tai cuc, dai cua
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
dai hoi » dai hoc, dai hai, dai moi
va nang » van nang, da nang, cam nang
luc ban » duc ban, cuc ban, luc bat

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang dai hoi. lieu va nang luc ban thanh ((thai cua) OR (tri cua)) te~".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang dai hoi. lieu va nang luc ban thanh ((thai cua) OR (tri cua)) te*.