Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien bach » vien bach, thien hach, hien hanh
bach nuoc » bach tuoc, sach nuoc, bich ngoc
cua thuoc » nha thuoc, cay thuoc, cua nuoc
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cua tuc » cua duc, luat tuc, cua nuoc
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
cua tu » cua su, cua cu, cua te

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