Perhaps you should try some spelling variations:
ve triet » va trien, su triet
tru nang » tri nang, truc nano, thi nang
tra nang » thi nang, kha nang, da nang
cham duc » pham duc, pham duy, phan duc
danh de » hanh de, dan de, dang de
va danh » va dinh, va dan, va hanh
tu sach » thu sach, su sach, te sach
hieu tu » chieu tu, hieu tuc, hien 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) OR (tra nang)) xa hoi. hieu tu ((cham duc) OR (cham soc)) va danh de ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tru nang) or (tra nang)) xa hoi. hieu tu ((cham duc) OR (cham soc)) va danh de ve triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tru nang) or (tra nang)) xa hoi. hieu tu ((cham duc) OR (cham soc)) va danh de ve triet*.