Perhaps you should try some spelling variations:
vien cua » viec cua, dien cua, tien cua
thu sac » thu sach, thu san, thu xac
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
cao suc » cao su
cao duc » dao duc, giao duc, tao duoc
cua te » cua tu
nhan » phan

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