Perhaps you should try some spelling variations:
nha thuoc » nha nuoc, nhan thuc, nha hoc
cao hoat » cac hoat, co hoat, cao chat
cam duc » cao duc, pham duc, nam duoc
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang cao hoat. hieu ve ((cam duc) OR (cam xuc)) va dan vi ((cua tu) or (nha thuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang cao hoat. hieu ve ((cam duc) OR (cam xuc)) va dan vi ((cua tu) OR (nha thuoc))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang cao hoat. hieu ve ((cam duc) OR (cam xuc)) va dan vi ((cua tu) or (nha thuoc))*".