Perhaps you should try some spelling variations:
nhan tien » nhan vien, nhan dien, phan tien
vien cac » vien bach, vien dai, vien da
thu sac » thu sach, thu san, thu xac
nang xa » nang x, lang xa, nang ma
va nhan » van nhan, ca nhan, va phan
sac ky » cac ky, sai ky
va cao » va cac, va co, va dao
cua tu » cua tuc, cua su, cua te
cua cu » cua chu, cua cau, cua su

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 nang xa hoi. hieu ((va cao) or (vien cac)) duc va nhan tien ((cua tu) OR (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang xa hoi. hieu ((va cao) OR (vien cac)) duc va nhan tien ((cua tu) OR (cua cu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sac ky nang xa hoi. hieu ((va cao) or (vien cac)) duc va nhan tien ((cua tu) OR (cua cu))".
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang xa hoi. hieu ((va cao) or (vien cac)) duc va nhan tien ((cua tu) OR (cua cu))*.