Perhaps you should try some spelling variations:
nghiem duoc » nghiem thuoc, nghe duoc
thuoc sach » hoc sach, nuoc sach, thuat sach
nha nghiem » nha nghien, khao nghiem, thi nghiem
nhiem duoc » nhiem cuoc, nghiem nuoc, nghiem quoc
thuoc can » thuoc ban, thuoc tan, thuc can
can tranh » canh tranh, tan tran, van ranh
hiem duoc » nhiem cuoc, bien duoc, hiem du
duoc hoc » quoc hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thuoc sach nha nghiem duoc hoc ) or ( thuoc can tranh ((nhiem duoc) or (hiem duoc)) hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuoc sach nha nghiem duoc hoc ) OR ( thuoc can tranh ((nhiem duoc) OR (hiem duoc)) hoc )).
• Adding a wildcard symbol may retrieve word variants: (( thuoc sach nha nghiem duoc hoc ) or ( thuoc can tranh ((nhiem duoc) or (hiem duoc)) hoc ))*.