Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
sach 2 » sach y
2 nang » v nang
va cam » va cham, va cac, va cao

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 2 nang xa hoi. hieu va cam xuc ((ban hang) OR (ngan hang)) vi ((cua triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach 2 nang xa hoi. hieu va cam xuc ((ban hang) or (ngan hang)) vi ((cua triet) OR (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: su sach 2 nang xa hoi. hieu va cam xuc ((ban hang) or (ngan hang)) vi ((cua triet) OR (cua viet))*.