Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh voi » hanh vi, hanh noi, hanh moi
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
hieu ve » hieu van
su sach » vu sach
so sach » so sanh, bo sach, co sach
cam tu » cam thu, nam tu, dam tu
tu van » tu va
voi su » voi suc, oi su, vi su
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) or (so sach)) ky nang x hoi. ((hieu ve) OR (hieu va)) cam tu van hanh voi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang x hoi. ((hieu ve) OR (hieu va)) cam tu van hanh voi su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ky nang x hoi. ((hieu ve) OR (hieu va)) cam tu van hanh voi su triet*".