Perhaps you should try some spelling variations:
nhan dien » nhan vien, nhan dieu, nhan dan
dien cuc » dien tu, dieu cua, vien cac
cuc tieu » muc tieu, cac tieu, cach tieu
nang xa » nang x, lang xa, nang ma
suc van » duc van, luc van, sac van
sac ky » sai ky
va bao » va bai
su van » tu van, vu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sac ky) or (cac ky)) nang xa hoi. lieu va bao ((suc van) OR (su van)) nhan dien cuc tieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sac ky) OR (cac ky)) nang xa hoi. lieu va bao ((suc van) OR (su van)) nhan dien cuc tieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sac ky) or (cac ky)) nang xa hoi. lieu va bao ((suc van) OR (su van)) nhan dien cuc tieu".
• Adding a wildcard symbol may retrieve word variants: thu ((sac ky) or (cac ky)) nang xa hoi. lieu va bao ((suc van) OR (su van)) nhan dien cuc tieu*.