Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, lieu va, hieu ve
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach ty
hanh di » hanh vi, hang di, danh di
hanh de » hanh ve, hanh kem
cau xuc » cam xuc, cau luc, cau truc
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: thu sach ky nang xa hoi. ((hieu van) OR (thien van)) cau xuc va ((hanh di) OR (hanh de)) va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. ((hieu van) OR (thien van)) cau xuc va ((hanh di) or (hanh de)) va triet~".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. ((hieu van) OR (thien van)) cau xuc va ((hanh di) or (hanh de)) va triet*.