Perhaps you should try some spelling variations:
nhan dien » nhan vien, nhan dan, toan dien
nhan dieu » nhung dieu, nhan vien
thu sac » thu sach, thu san, thu xac
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
bao duc » dao duc, bao luc, cao duc
ve bao » te bao, va bao
sac ky » cac ky, sai ky
cua te » cua tu

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