Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
cham luc » cham soc, nhan luc, cham cuu
va cham » va chat, va tham
hieu va » lieu va, hieu qua
sach va » sach xa, sach dao, sach nha
tang ma » mang may, tang van
sach ha » sach nha, sach han, sach xa
vai cua » dai cua, hai cua, lai 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: su ((sach va) OR (sach ha)) tang ma hoa. hieu va cham luc ((va thanh) OR (ban thanh)) vai cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach va) OR (sach ha)) tang ma hoa. hieu va cham luc ((va thanh) or (ban thanh)) vai cua vat~".
• Adding a wildcard symbol may retrieve word variants: su ((sach va) OR (sach ha)) tang ma hoa. hieu va cham luc ((va thanh) or (ban thanh)) vai cua vat*.