Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
su sach » vu sach
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
nang xa » nang x, lang xa, nang ma
van bao » van ban, van dao
bao duc » dao duc, bao luc, cao duc
doi su » oi su, don su, voi su

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) or (((so sach) OR (bo sach)))) ky nang xa hoi. hieu van bao duc va thanh doi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (((so sach) OR (bo sach)))) ky nang xa hoi. hieu van bao duc va thanh doi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (((so sach) OR (bo sach)))) ky nang xa hoi. hieu van bao duc va thanh doi su triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (((so sach) OR (bo sach)))) ky nang xa hoi. hieu van bao duc va thanh doi su triet*.