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