Perhaps you should try some spelling variations:
ve triet » va trien
hieu van » thien van, lieu va, hieu ve
su triet » su viet, su tien
va danh » va dinh, va dan, va hanh
danh de » hanh de, dan de, dang de
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cau luc » cau truc, cau phuc
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va

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 y nang xa hoi. ((hieu van) OR (hieu va)) cau luc va danh de ((su triet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. ((hieu van) or (hieu va)) cau luc va danh de ((su triet) OR (ve triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. ((hieu van) or (hieu va)) cau luc va danh de ((su triet) OR (ve triet))*.