Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
hien bach » vien bach, thien hach, hien hanh
danh doi » thanh doi, dung doi, danh hoa
su sach » so sach, vu sach
duoc va » nuoc va, duc va, duoc ma
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
tuoc va » thuoc va, nuoc va, tuc va
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. dieu hien bach ((tuoc va) or (duoc va)) ((danh doi) OR (danh di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. dieu hien bach ((tuoc va) OR (duoc va)) ((danh doi) OR (danh di)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. dieu hien bach ((tuoc va) or (duoc va)) ((danh doi) OR (danh di)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. dieu hien bach ((tuoc va) or (duoc va)) ((danh doi) OR (danh di)) cua tre*.