Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
cac luc » cau luc, coc luc, cac cuoc
va hanh » va thanh, va danh, ban hanh
hai cua » thai cua, dai cua, hoi cua
vu san » va san, vu ban
san ky » sang ky, van ky, dan ky
cua te » cua tu

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 ky nang xa hoi. hieu viec ((cac luc) OR (cac nuoc)) ((va hanh) or (van hanh)) hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu san ky nang xa hoi. hieu viec ((cac luc) OR (cac nuoc)) ((va hanh) OR (van hanh)) hai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu san ky nang xa hoi. hieu viec ((cac luc) OR (cac nuoc)) ((va hanh) or (van hanh)) hai cua te*".