Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hanh de » hanh ve, hanh kem
y nang » ky nang, ly nang, v nang
va cau » van cau, va cac, va dau
luc va » duc va, loc va
tuc va » thuc va, truc va, duc va
de cua » le cua, te cua, dieu cua

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