Perhaps you should try some spelling variations:
su sach » vu sach
so sach » so sanh, bo sach, co sach
xang xa » lang xa, mang xa, ang xa
dau tuc » dau tu, dao tuc, cau truc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
va dau » va dao
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) ty xang xa hoi. lieu va dau tuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ty xang xa hoi. lieu va dau tuc va hanh vi cua tre*.