Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
cham duc » pham duc, cham soc, pham duy
khien tu » dien tu
dung de » dung he, dung dat
danh de » hanh de, dan de, dang de
tu sach » thu sach, su sach, te sach
hien tu » dien 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 tru nang x ho. ((hien tu) OR (khien tu)) cham duc va ((danh de) OR (dung de)) su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tru nang x ho. ((hien tu) OR (khien tu)) cham duc va ((danh de) or (dung de)) su triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach tru nang x ho. ((hien tu) OR (khien tu)) cham duc va ((danh de) or (dung de)) su triet*.