Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
va thanh » gia thanh, ban thanh, va tinh
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, mang xa
vai cua » dai cua, lai cua, bai cua
hai cua » thai cua, dai cua, hoi cua
qua cac » cua cac
cac bo » bac bo, cac co
bo va » bao va, do va, so va

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sach ky ((nang xa) OR (nang ma)) hoi. hieu qua cac bo va thanh ((vai cua) or (hai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach ky ((nang xa) OR (nang ma)) hoi. hieu qua cac bo va thanh ((vai cua) OR (hai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach ky ((nang xa) OR (nang ma)) hoi. hieu qua cac bo va thanh ((vai cua) or (hai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: nuoc sach ky ((nang xa) OR (nang ma)) hoi. hieu qua cac bo va thanh ((vai cua) or (hai cua)) triet*.