Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cham duc » pham duc, cham soc, pham duy
sach tri » sach tren, sach truc, sach bai
hieu tuc » hieu thuc, hieu luc, hieu thuoc
sach tai » sach bai, sach tham, sach dao
hien tu » khien tu, dien tu
va dan » ca dan, va dao, va dau
dan de » dan den, dang de, van de
x hoi » xa hoi, o hoi, x ho
de su » den su, ve su, de tu

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: tu ((sach tri) OR (sach tai)) nang x hoi. ((hieu tuc) OR (hien tu)) cham duc va dan de su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tri) OR (sach tai)) nang x hoi. ((hieu tuc) or (hien tu)) cham duc va dan de su triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tri) OR (sach tai)) nang x hoi. ((hieu tuc) or (hien tu)) cham duc va dan de su triet*.