Perhaps you should try some spelling variations:
lai cuoc » tai cuc, va cuoc, lai cua
cham luc » cham soc, nhan luc, cham cuu
dang xay » dang van, van xay
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
lai cuu » lai cua, lai chau, loai cua
so sach » so sanh, bo sach, co sach
luc va » duc va, tuc va, loc va

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: so sach ky ((nang x) OR (dang xay)) hoi. hieu va cham luc va hanh ((lai cuu) OR (lai cuoc)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky ((nang x) or (dang xay)) hoi. hieu va cham luc va hanh ((lai cuu) OR (lai cuoc)) tre~".
• Adding a wildcard symbol may retrieve word variants: so sach ky ((nang x) or (dang xay)) hoi. hieu va cham luc va hanh ((lai cuu) OR (lai cuoc)) tre*.