Perhaps you should try some spelling variations:
nhan dien » nhan vien, nhan dieu, toan dien
nhan dan » phan dau, gian dan, nhan tai
sach ky » sac ky, sach ty, sach kem
cao tuc » dao tuc, cao duc, cao suc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ve cao » va cao, ve bao, ve cac
tuc va » thuc va, truc va, tuc xa
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 ((sach ky) or (sach y)) nang xa hoi. hieu ve cao tuc va ((nhan dien) OR (nhan dan)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach y)) nang xa hoi. hieu ve cao tuc va ((nhan dien) OR (nhan dan)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) or (sach y)) nang xa hoi. hieu ve cao tuc va ((nhan dien) OR (nhan dan)) cua te".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sach y)) nang xa hoi. hieu ve cao tuc va ((nhan dien) OR (nhan dan)) cua te*.