Perhaps you should try some spelling variations:
nha thuoc » nha nuoc, nhan thuc, nha hoc
cua thuoc » cay thuoc, cua nuoc, cua quoc
hoang xa » hoang ha, hoang va, hoang xuan
duoc ma » duoc lam
tu sach » thu sach, su sach, te sach
y hoang » x hoang, _ hoang, m hoang
duoc va » nuoc va, duc va, duong va
hieu va » lieu va, hieu qua
va hoc » van hoc

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 y hoang xa hoi. hieu va hoc ((duoc va) or (duoc ma)) hanh vi ((cua thuoc) OR (nha thuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y hoang xa hoi. hieu va hoc ((duoc va) OR (duoc ma)) hanh vi ((cua thuoc) OR (nha thuoc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y hoang xa hoi. hieu va hoc ((duoc va) or (duoc ma)) hanh vi ((cua thuoc) OR (nha thuoc))".
• Adding a wildcard symbol may retrieve word variants: tu sach y hoang xa hoi. hieu va hoc ((duoc va) or (duoc ma)) hanh vi ((cua thuoc) OR (nha thuoc))*.