Perhaps you should try some spelling variations:
nguoi sach » nguoi san, nuoc sach
huu chuc » huu phuc, huu thuc, huu phuoc
chuc van » chu van, chuc va, thuc van
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu van
ve huu » le huu, vu huu, va huu
di cua » doi cua, de cua, do cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: nguoi sach ky ((nang xa) or (nang x)) hoi. hieu ve huu chuc van hanh ((di cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nguoi sach ky ((nang xa) OR (nang x)) hoi. hieu ve huu chuc van hanh ((di cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nguoi sach ky ((nang xa) or (nang x)) hoi. hieu ve huu chuc van hanh ((di cua) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: nguoi sach ky ((nang xa) or (nang x)) hoi. hieu ve huu chuc van hanh ((di cua) OR (dai cua)) tre*.