Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien sach » dien sach, kien sach, thien hach
sach nuoc » sach duoc, cac nuoc, bach tuoc
dia danh » dia ban, gia dinh
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
de cua » te cua, dieu cua
le cua » ly cua

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 y nang xa hoi. hieu hien sach nuoc ((va hanh) or (dia danh)) ((de cua) OR (le cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu hien sach nuoc ((va hanh) OR (dia danh)) ((de cua) OR (le cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu hien sach nuoc ((va hanh) or (dia danh)) ((de cua) OR (le cua)) triet*".