Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien cac » thien cac, vien cac, hieu cac
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
ky dang » ky nang
ky danh » ky anh
cac tuc » cac toc, cac tu, cac tac
tuc van » thuc van, truc van, tuc va
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: su sach ((ky dang) OR (ky danh)) xa hoi. hieu hien cac tuc van hanh vi va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky dang) OR (ky danh)) xa hoi. hieu hien cac tuc van hanh vi va triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky dang) OR (ky danh)) xa hoi. hieu hien cac tuc van hanh vi va triet*.