Perhaps you should try some spelling variations:
nhan dieu » nhung dieu, nhan vien
dieu cua » dieu tra
cao tuc » dao tuc, cao suc, cao toc
va nhan » van nhan, ca nhan, va phan
cao duc » dao duc, cao suc, giao duc
hieu ve » hieu va, hieu van
sach ky » sac ky, sach ty, sach kem
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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