Perhaps you should try some spelling variations:
nhan dien » nhan vien, nhan dieu, nhan dan
dien cuc » dien tu, dieu cua, vien cac
van nhan » van phan, van thanh, danh nhan
cao suc » cao su, cao duc
bao suc » bao luc, bao thuc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sac ky » sai ky
cuc te » cua te, cuc thue, cuc tieu

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