Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
thue nang » thien nang, thuat nang, thi nang
su triet » su viet, su tien, ve triet
cua viet » ca viet, hoa viet, cua vat
van hang » van khang, van hoang, van thang
hang di » hang doi, hang vi, hang dien
so sach » so sanh, bo sach, co sach
cam tuc » cam tu, nam thuc, dam thuc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thue nang xa hoi. hieu ve ((cam tuc) OR (cam xuc)) van hang di ((cua viet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thue nang xa hoi. hieu ve ((cam tuc) OR (cam xuc)) van hang di ((cua viet) or (su triet))~".
• Adding a wildcard symbol may retrieve word variants: so sach thue nang xa hoi. hieu ve ((cam tuc) OR (cam xuc)) van hang di ((cua viet) or (su triet))*.