Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
danh co » danh cho, doanh co, anh co
va danh » va dinh, va dan, va hanh
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
ve dao » de dao, va dao, ve bao
co cua » con cua, ca cua, cong cua
ve dat » de dat, va dat, viec dat

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky ((nang xa) or (nang x)) hoi. hieu ((ve dat) OR (ve dao)) nuoc va danh co cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (nang x)) hoi. hieu ((ve dat) OR (ve dao)) nuoc va danh co cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang xa) or (nang x)) hoi. hieu ((ve dat) OR (ve dao)) nuoc va danh co cua tre*".