Perhaps you should try some spelling variations:
bich ngoc » bich nga, dinh ngoc
hieu hien » bieu hien, dieu hien, chieu chien
bach nuoc » bach tuoc, sach nuoc, cac nuoc
cua nuoc » cua quoc, cua nguoi, cua thuoc
cua tuc » cua duc, cua tu, cua thuoc
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va

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

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