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
tuc van » thuc van, truc van, tuc va
su sach » so sach, vu sach
bo sach » co sach, hoc sach
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
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 (bo sach)) ky nang x hoi. hieu ((ve cam) OR (va cam)) tuc van hanh voi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (bo sach)) ky nang x hoi. hieu ((ve cam) OR (va cam)) tuc van hanh voi su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (bo sach)) ky nang x hoi. hieu ((ve cam) OR (va cam)) tuc van hanh voi su triet*".