Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien bach » vien bach, thien hach, hien hanh
thuoc va » thuc va, thuoc ma, thuong va
danh hoi » danh hoa, dan hoi, danh hoc
su sach » so sach, vu sach
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
duoc va » nuoc va, duc va, duoc ma
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma

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 ((thuoc va) or (duoc va)) danh hoi ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu hien bach ((thuoc va) OR (duoc va)) danh hoi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu hien bach ((thuoc va) or (duoc va)) danh hoi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu hien bach ((thuoc va) or (duoc va)) danh hoi ((cua tre) OR (cuu tre))*.