Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
van tieu » van hieu, van tien, vay tieu
thai van » thi van, thanh van, thai vung
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
cao duc » dao duc, cao suc, giao duc
su sach » so sach, vu sach
hieu ve » hieu van
le manh » le minh, le thanh

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 ((le manh) or (le anh)) xa hoi. ((hieu ve) OR (hieu va)) cao duc va hanh thai van tieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((le manh) OR (le anh)) xa hoi. ((hieu ve) OR (hieu va)) cao duc va hanh thai van tieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((le manh) or (le anh)) xa hoi. ((hieu ve) OR (hieu va)) cao duc va hanh thai van tieu".
• Adding a wildcard symbol may retrieve word variants: su sach ((le manh) or (le anh)) xa hoi. ((hieu ve) OR (hieu va)) cao duc va hanh thai van tieu*.