Perhaps you should try some spelling variations:
nha thuoc » nha nuoc, nhan thuc, nha hoc
cua thuoc » cay thuoc, cua nuoc, cua quoc
thu sach » thuat sach, thuoc sach, thu hoach
lam tuc » lam thuoc, lam truoc, luat tuc
dinh vi » dinh ve, dinh viet, dinh tri
xa dinh » xac dinh, va dinh, ba dinh
tu sach » su sach, te sach, tu cach
nang o » nang co, nang ho, nang ro
va lam » van lam, va lap
o hoi » co hoi, o hoc, o hai

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) or (thu sach)) ky nang o hoi. lieu va lam tuc xa dinh vi ((cua thuoc) OR (nha thuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang o hoi. lieu va lam tuc xa dinh vi ((cua thuoc) OR (nha thuoc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang o hoi. lieu va lam tuc xa dinh vi ((cua thuoc) OR (nha thuoc))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang o hoi. lieu va lam tuc xa dinh vi ((cua thuoc) OR (nha thuoc))*.