Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » thuat sach, thuoc sach, thu hoach
hieu va » lieu va, hieu qua
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
tu sach » su sach, te sach, tu cach
hai cuc » tai cuc, hai cua, thai cua
va hai » van hai, va chai, va khai
cuc va » chuc va, duc va, cuu va
v nang » va nang, vu nang, van nang

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) OR (thu sach)) v nang x ho. hieu va hai cuc va ((hanh di) OR (hanh de)) cua triet~.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) v nang x ho. hieu va hai cuc va ((hanh di) or (hanh de)) cua triet*.