Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu tuc » hieu thuc, hieu luc, hieu thuoc
cham duc » pham duc, cham soc, pham duy
sach tri » sach tai, sach tren, sach truc
tri nang » thi nang, tra nang, tri bang
hien tu » khien tu, dien tu
va danh » va dinh, va dan, va hanh
x hoi » xa hoi, o hoi, x ho
de su » den su, ve su, da su
de tu » do 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: thu sach tri nang x hoi. ((hieu tuc) OR (hien tu)) cham duc va danh ((de su) OR (de tu)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach tri nang x hoi. ((hieu tuc) or (hien tu)) cham duc va danh ((de su) OR (de tu)) triet~".
• Adding a wildcard symbol may retrieve word variants: thu sach tri nang x hoi. ((hieu tuc) or (hien tu)) cham duc va danh ((de su) OR (de tu)) triet*.