Perhaps you should try some spelling variations:
thanh dong » thanh duong, thanh cong, hanh dong
phuc ban » thuc ban, thuoc ban, phuc hang
dong cua » dung cua, cong cua, huong cua
phuc van » thuc van, phuc va, chuc van
hieu va » lieu va, hieu qua
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
va cau » van cau, va cac, va dau
cua te » cua tu
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang ((x hoi) OR (o hoi)). hieu va cau ((phuc ban) or (phuc van)) thanh dong cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang ((x hoi) OR (o hoi)). hieu va cau ((phuc ban) OR (phuc van)) thanh dong cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang ((x hoi) OR (o hoi)). hieu va cau ((phuc ban) or (phuc van)) thanh dong cua te".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang ((x hoi) OR (o hoi)). hieu va cau ((phuc ban) or (phuc van)) thanh dong cua te*.