Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
cham duc » pham duc, cham soc, pham duy
va cham » va chat, va tham
sach ty » sach y, sach thu, xach tay
sach tu » sach thu, cach tu, sach uu
hieu va » lieu va, hieu qua
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: su ((sach ty) OR (sach tu)) nang x hoi. hieu va cham duc ((van hanh) or (ban hanh)) dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach tu)) nang x hoi. hieu va cham duc ((van hanh) OR (ban hanh)) dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach tu)) nang x hoi. hieu va cham duc ((van hanh) or (ban hanh)) dai cua triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach tu)) nang x hoi. hieu va cham duc ((van hanh) or (ban hanh)) dai cua triet*.