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

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 (de dat)) 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 (de dat)) 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 (de dat)) nuoc va danh co cua tre*".