Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
cua triet » cua viet, su triet, va triet
dinh vai » dinh van, dinh vi, dinh va
vai cua » dai cua, hai cua, lai cua
va dinh » van dinh, va kinh, va tinh
sach ky » sac ky, sach ty, sach kem
cac co » cac cong
cac bo » bac bo

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 ky) OR (sach y)) nang x ho. hieu hien ((cac bo) OR (cac co)) va dinh vai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) nang x ho. hieu hien ((cac bo) OR (cac co)) va dinh vai cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) nang x ho. hieu hien ((cac bo) OR (cac co)) va dinh vai cua triet*.