Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cham duc » pham duc, cham soc, pham duy
va thanh » gia thanh, va tinh, le thanh
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
xang ma » nang ma, sang ma, rang ma
tang ma » mang may, tang van
va cham » va chat, va tham
hai cua » thai cua, dai cua, hoi 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 ty ((xang ma) or (tang ma)) hoi. lieu va cham duc ((va thanh) OR (ban thanh)) hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((xang ma) OR (tang ma)) hoi. lieu va cham duc ((va thanh) OR (ban thanh)) hai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((xang ma) or (tang ma)) hoi. lieu va cham duc ((va thanh) OR (ban thanh)) hai cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((xang ma) or (tang ma)) hoi. lieu va cham duc ((va thanh) OR (ban thanh)) hai cua viet*.