Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh dao » lanh dao, thanh dat, thanh dam
nhan tai » hang tai, van tai, toan tai
chat xuc » chat huu, cam xuc, chao xu
hieu va » lieu va
sach ky » sac ky, sach y, sach ty
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
tu sach » thu sach, su sach, te sach
xuc va » duc va, tuc va, luc 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 ky tang xa hoi. ((hieu va) OR (hieu qua)) chat xuc va ((nhan tai) OR (hanh dao)) va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang xa hoi. ((hieu va) OR (hieu qua)) chat xuc va ((nhan tai) or (hanh dao)) va triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang xa hoi. ((hieu va) OR (hieu qua)) chat xuc va ((nhan tai) or (hanh dao)) va triet*.