Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien bach » vien bach, thien hach, hien hanh
bach tuoc » sach duoc, sach nuoc
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
tuoc va » thuoc va, nuoc va, duoc va
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, dua tren

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 nang xa hoi. hieu hien bach tuoc va danh di ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu hien bach tuoc va danh di ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu hien bach tuoc va danh di ((cua tre) OR (cua triet))*.