Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
bach tuoc » sach duoc
sach nuoc » sach duoc, cac nuoc, dich nuoc
cua triet » cua viet, su triet, va triet
hanh vai » hanh vi, hanh va, hanh tai
sach ky » sac ky, sach ty, sach kem
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) OR (sach y)) nang x hoi. hieu viec ((bach tuoc) or (sach nuoc)) va hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang x hoi. hieu viec ((bach tuoc) OR (sach nuoc)) va hanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) nang x hoi. hieu viec ((bach tuoc) or (sach nuoc)) va hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) nang x hoi. hieu viec ((bach tuoc) or (sach nuoc)) va hanh vai cua triet*.