Perhaps you should try some spelling variations:
hien bach » vien bach, thien hach, hien hanh
bach tuoc » sach duoc, sach nuoc
hieu hien » bieu hien, dieu hien, chieu chien
va triet » va thiet, ve triet, cua triet
va trien » va truyen, va thiet, va tuyen
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
tuoc va » thuoc va, nuoc va, duoc va
va danh » va dinh, va dan, va hanh
danh tu » anh tu, doanh thu
su sach » vu sach

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)) ky nang xa hoi. hieu hien bach tuoc va danh tu ((va triet) OR (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang xa hoi. hieu hien bach tuoc va danh tu ((va triet) OR (va trien))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ky nang xa hoi. hieu hien bach tuoc va danh tu ((va triet) OR (va trien))*".