Perhaps you should try some spelling variations:
va thieu » va thiet, va hieu, va tieu
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
sach ky » sac ky, sach y, sach ty
te sach » toc sach
hieu ve » hieu va
ly ban » uy ban, ly bai
lo ban » co ban, lo van
x hoi » xa hoi, o hoi, x ho
vi va » vi van, vai va, vu va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang x hoi. ((hieu ve) OR (hieu van)) cac ((ly ban) or (lo ban)) thanh vi va thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. ((hieu ve) OR (hieu van)) cac ((ly ban) OR (lo ban)) thanh vi va thieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. ((hieu ve) OR (hieu van)) cac ((ly ban) or (lo ban)) thanh vi va thieu".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. ((hieu ve) OR (hieu van)) cac ((ly ban) or (lo ban)) thanh vi va thieu*.