Perhaps you should try some spelling variations:
nguoi sach » nguoi san, nuoc sach
van hanh » van thanh, ban hanh, van anh
chuc van » chu van, chuc va, thuc van
nang xa » lang xa, nang ma, mang xa
hanh di » hanh vi, hanh de, hang di
sach ky » sac ky, sach y, sach ty
di cua » dai cua, doi cua, de cua
cua te » cua tu
vu huu » vu huy, tu huu
ve huu » le huu, va huu, vien huu

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) OR (vu huu)) chuc van hanh di cua te~.
• 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) OR (vu huu)) chuc van hanh di cua te.
• 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) OR (vu huu)) chuc van hanh di cua te".
• Adding a wildcard symbol may retrieve word variants: nguoi sach ky ((nang xa) or (nang x)) hoi. hieu ((ve huu) OR (vu huu)) chuc van hanh di cua te*.