Perhaps you should try some spelling variations:
ban thanh » ban hang
cham dua » chay dua, cham giua, pham duc
lai cuoc » tai cuc, va cuoc, lai cua
ban hanh » ban hang
toc sach » hoc sach, doc sach, thuoc sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
lai cuu » lai cua, lai chau, loai cua
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang ma hoa. hieu ve cham dua ((ban thanh) or (ban hanh)) ((lai cuu) OR (lai cuoc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ma hoa. hieu ve cham dua ((ban thanh) OR (ban hanh)) ((lai cuu) OR (lai cuoc)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang ma hoa. hieu ve cham dua ((ban thanh) or (ban hanh)) ((lai cuu) OR (lai cuoc)) tre".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ma hoa. hieu ve cham dua ((ban thanh) or (ban hanh)) ((lai cuu) OR (lai cuoc)) tre*.