Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
pham thu » pham thuc, pham tu, phap thu
hanh di » hanh vi, hanh de, hang di
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
ty nang » ky nang, ty hang, ly nang
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, de 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 ((ty nang) OR (ty xang)) ma hoi. hieu va ((pham thu) OR (pham thi)) ban hanh di cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ty xang)) ma hoi. hieu va ((pham thu) or (pham thi)) ban hanh di cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) OR (ty xang)) ma hoi. hieu va ((pham thu) or (pham thi)) ban hanh di cua triet*.