Perhaps you should try some spelling variations:
khanh luan » khanh thuan, doanh luan, hang luan
cong thanh » dong thanh, cong trinh, cong tan
hanh luan » hang luan, hanh luat, han luan
dung cong » dung trong
thanh hoa » thanh pho
hoc kinh » luoc kinh
hoa tap » khoa tap, hoc tap, hoa tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc kinh) or (hoc sinh)) sach - ((hanh luan) or (khanh luan)) tin dung cong thanh hoa tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc kinh) OR (hoc sinh)) sach - ((hanh luan) OR (khanh luan)) tin dung cong thanh hoa tap.
• Adding a wildcard symbol may retrieve word variants: ((hoc kinh) or (hoc sinh)) sach - ((hanh luan) or (khanh luan)) tin dung cong thanh hoa tap*.