Perhaps you should try some spelling variations:
hien bach » vien bach, thien hach, hien hanh
hieu hien » bieu hien, dieu hien, chieu chien
bach nuoc » bach tuoc, sach nuoc, bich ngoc
co sach » bo sach, cuon sach, hoc sach
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
cua tu » cua tuc, cua cu, cua te
cua su » qua su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ky ((nang xa) or (nang x)) hoi. hieu hien bach nuoc va danh vi ((cua tu) OR (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ky ((nang xa) OR (nang x)) hoi. hieu hien bach nuoc va danh vi ((cua tu) OR (cua su))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ky ((nang xa) or (nang x)) hoi. hieu hien bach nuoc va danh vi ((cua tu) OR (cua su))*".