Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh vai » hanh va, hanh tai, hanh van
hieu van » hieu va, thien van, lieu va
cam tuc » cam xuc, cam tu, nam thuc
su sach » so sach, vu sach
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
van cam » van nam, van lam, van cau
tuc va » thuc va, truc va, tuc xa

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 ma) OR (sang ma)) hoi. hieu van cam tuc va ((hanh vai) OR (hanh vi)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang ma) OR (sang ma)) hoi. hieu van cam tuc va ((hanh vai) or (hanh vi)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang ma) OR (sang ma)) hoi. hieu van cam tuc va ((hanh vai) or (hanh vi)) cua triet*.