Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh ve » hanh ve, thanh va, thanh vien
vu sach » vu bach, su sach, vu khach
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
cao vuc » cao duc, cao vu, cao quoc
cao suc » cao su, cao duc
x hoi » o hoi, x ho, 5 hoi
ve su » va su
kien » bien, vien, tien

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach vu nang ((x hoi) or (xa hoi)). hieu qua ((cao vuc) OR (cao suc)) van thanh ve su kien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach vu nang ((x hoi) OR (xa hoi)). hieu qua ((cao vuc) OR (cao suc)) van thanh ve su kien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach vu nang ((x hoi) or (xa hoi)). hieu qua ((cao vuc) OR (cao suc)) van thanh ve su kien".
• Adding a wildcard symbol may retrieve word variants: vu sach vu nang ((x hoi) or (xa hoi)). hieu qua ((cao vuc) OR (cao suc)) van thanh ve su kien*.