Perhaps you should try some spelling variations:
nghiem duoc » nghiem thuoc, nghe duoc
trach nhiem » trac nghiem
thuoc sach » hoc sach, nuoc sach, thuat sach
nhiem du » hiem du, nghiem dau, nhiem huu
duoc hoc » quoc hoi
thu ban » thu hang
du hoc » tu hoc
kinh » dinh, minh

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

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