Perhaps you should try some spelling variations:
nghiem duoc » nghiem thuoc, nghe duoc
nghiep dan » nghiep dai, nghiep van, nghiep ban
nghiep can » nghiep chan, nghiep cay, nghiep cau
thu nghiem » thuc nghiem, thi nghiem
van khanh » van thanh, van hanh, van anh
khanh thu » nhanh thu, thanh thu, khanh thuan
sach lam » cach lam, sach tham, sach luan
duoc hoc » quoc hoi
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sach lam ((nghiep dan) OR (nghiep can)) hoc ) or ( van khanh thu nghiem duoc hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach lam ((nghiep dan) OR (nghiep can)) hoc ) OR ( van khanh thu nghiem duoc hoc ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( te sach lam ((nghiep dan) OR (nghiep can)) hoc ) or ( van khanh thu nghiem duoc hoc ))*".