Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
dang xay » dang van, van xay
va thanh » gia thanh, ban thanh, va tinh
bo sach » co sach, hoc sach
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sach ky » sac ky, sach y, sach ty

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach ky ((dang xay) or (nang x)) hoi. hieu va cham duc va thanh ((vai cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ky ((dang xay) OR (nang x)) hoi. hieu va cham duc va thanh ((vai cua) OR (hai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: bo sach ky ((dang xay) or (nang x)) hoi. hieu va cham duc va thanh ((vai cua) or (hai cua)) tre*.