Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh doi » thanh doi, hanh noi, hang doi
van hanh » van thanh, ban hanh, van anh
truc van » truc va, thuc van, truc ban
cac truc » cau truc, cac tru, cac trung
cuu nong » cuu cong, cuu nang, cuu tong
qua cac » cua cac
so sach » so sanh, bo sach, hoc sach
uu nang » cuu nang, vu nang, dun nang
co sach » bo sach, cuon sach, hoc sach
doi su » oi su, don su, voi 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: ((so sach) OR (co sach)) ((uu nang) or (cuu nong)) x hoi. hieu qua cac truc van hanh doi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ((uu nang) OR (cuu nong)) x hoi. hieu qua cac truc van hanh doi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (co sach)) ((uu nang) or (cuu nong)) x hoi. hieu qua cac truc van hanh doi su triet".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (co sach)) ((uu nang) or (cuu nong)) x hoi. hieu qua cac truc van hanh doi su triet*.