Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
ban hanh » ban hang
hanh hoi » hanh thoi, hanh noi, hanh hoa
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
dau tuc » dau tu, dao tuc, cau truc
tuc ban » thuc ban, truc ban, tu ban
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thu nang xa hoi. lieu va dau tuc ban hanh hoi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu nang xa hoi. lieu va dau tuc ban hanh hoi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: so sach thu nang xa hoi. lieu va dau tuc ban hanh hoi ((cua tre) or (cuu tre))*.