Perhaps you should try some spelling variations:
nghia duoc » nghia cuoc, nghia quoc, nghiem duoc
thi nghiem » thuc nghiem
nghiem ban » nghiem van, nghiem xuan, nghiep bang
khac tuan » khai tuan, khau luan, pham tuan
khac duan » nhac dan, khau luan, khai tuan
phai thi » pham thi, phan thi, phap thi
tu phai » tu phat, tu phap, cu phai
ban hoc » bang hoc, van hoc, bai 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 ((khac tuan) OR (khac duan)) nghia duoc si ) or ( tu phai thi nghiem ban hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu ((khac tuan) OR (khac duan)) nghia duoc si ) OR ( tu phai thi nghiem ban hoc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu ((khac tuan) OR (khac duan)) nghia duoc si ) or ( tu phai thi nghiem ban hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( tu ((khac tuan) OR (khac duan)) nghia duoc si ) or ( tu phai thi nghiem ban hoc ))*.