Perhaps you should try some spelling variations:
nghiem quoc » nghiem duoc, nghiem nuoc, nghiep quoc
thi nghiem » thuc nghiem
nghiem ban » nghiem van, nghiem xuan, nghiep bang
nghia quoc » nghia cuoc, nghia duoc, nghiep quoc
sach tuan » sach luan, mach tuan, sach quan
hanh thi » nhanh thi, hanh thoi, anh thi
co hanh » co thanh, co phanh, co anh
ban hoc » bang hoc, van hoc, bai hoc
bo sach » co sach, hoc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( co hanh thi nghiem ban hoc ) or ( bo sach tuan ((nghia quoc) OR (nghiem quoc)) hoi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( co hanh thi nghiem ban hoc ) OR ( bo sach tuan ((nghia quoc) OR (nghiem quoc)) hoi )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( co hanh thi nghiem ban hoc ) or ( bo sach tuan ((nghia quoc) OR (nghiem quoc)) hoi ))".
• Adding a wildcard symbol may retrieve word variants: (( co hanh thi nghiem ban hoc ) or ( bo sach tuan ((nghia quoc) OR (nghiem quoc)) hoi ))*.