Perhaps you should try some spelling variations:
luat hoi » luat moi, luat so, luat dai
tu sach » thu sach, su sach, te sach
va danh » va dinh, va dan, va hanh
cac xuc » cam xuc, cac nuoc, chat xuc
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
lai hoi » dai hoi, lai hoa, lai roi
ky dang » ky nang, ky danh
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
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.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky dang ((luat hoi) or (lai hoi)). hieu ve cac xuc va danh ((vi cua) OR (di cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang ((luat hoi) OR (lai hoi)). hieu ve cac xuc va danh ((vi cua) OR (di cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang ((luat hoi) or (lai hoi)). hieu ve cac xuc va danh ((vi cua) OR (di cua)) te*".