Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
tu sach » thu sach, su sach, te sach
xuc ban » duc ban, cuc ban, quoc ban
xuc van » duc van, luc van, vuc van
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang mai hoi. hieu ve cac ((xuc van) OR (xuc ban)) thanh ((vi cua) OR (di cua)) duc~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang mai hoi. hieu ve cac ((xuc van) or (xuc ban)) thanh ((vi cua) OR (di cua)) duc~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang mai hoi. hieu ve cac ((xuc van) or (xuc ban)) thanh ((vi cua) OR (di cua)) duc*.