Perhaps you should try some spelling variations:
van nhan » van phan, van thanh, danh nhan
vien cua » viec cua, dien cua, bien cua
tien cua » trien cua, tiep cua, dien cua
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
luc van » luoc van, luu van, duc van
xac ky » cac ky, sac ky
bac ky » cac ky, ban ky, sac ky
co luc » coc luc, co luy
va co » vo co

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((xac ky) OR (bac ky)) nang xa hoi. hieu va co luc van nhan ((vien cua) or (tien cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((xac ky) OR (bac ky)) nang xa hoi. hieu va co luc van nhan ((vien cua) OR (tien cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((xac ky) OR (bac ky)) nang xa hoi. hieu va co luc van nhan ((vien cua) or (tien cua)) te".
• Adding a wildcard symbol may retrieve word variants: thu ((xac ky) OR (bac ky)) nang xa hoi. hieu va co luc van nhan ((vien cua) or (tien cua)) te*.