Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec cac » vien cac, viec cua, viec lam
van hanh » van thanh, ban hanh, van anh
cac luc » cau luc, coc luc, cac nuoc
vai cua » dai cua, hai cua, lai cua
va hanh » va thanh, va danh, ban hanh
vu san » vu ban
va san » va ban
cua te » cua tu
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: ((vu san) OR (va san)) ky nang x hoi. hieu viec cac luc ((va hanh) or (van hanh)) vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu san) OR (va san)) ky nang x hoi. hieu viec cac luc ((va hanh) OR (van hanh)) vai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu san) OR (va san)) ky nang x hoi. hieu viec cac luc ((va hanh) or (van hanh)) vai cua te*".