Perhaps you should try some spelling variations:
"dung toi luan va. tac trung hoc mo" » "dung toi luan va. trac trung hoc mo", "dung toi luan va. tai trung hoc mo", "dung toi luan va. tac trong hoc mo", "dung toi luan va. tac trung quoc mo", "dung thoi luan va. tac trung hoc mo", "dung tai luan va. tac trung hoc mo", "dung doi luan va. tac trung hoc mo", "dung hoi luan va. tac trung hoc mo", "dung thi luan va. tac trung hoc mo", "dung toi lua va. tac trung hoc mo", "dung toi luan van. tac trung hoc mo", "dung toi luat va. tac trung hoc mo", "dung toi luan va. tac trung hoc moi", "dung toi luan va. tac trung hoc mot", "dung toi luan va. tac trung hoc mon"
"dung thi que van. tin dung hoc tang" » "dung tai que van. tin dung hoc tang", "dung tri que van. tin dung hoc tang", "dung chi que van. tin dung hoc tang", "dung thi que van. tin dong hoc tang", "dung thi que van. tin dung thuoc tang", "dung thi que van. tin dung khoa tang", "dung thi que van. tin dung hoc bang", "dung thi que van. tin dung hoc tan", "dung thi que van. tin dung hoc tieng", "dung thi hue van. tin dung hoc tang", "dung thi quy van. tin dung hoc tang", "dung nghi que van. tin dung hoc tang", "dung thi qua van. tin dung hoc tang", "dung thi quyet van. tin dung hoc tang"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("dung toi luan va. tac trung hoc mo") or ("dung thi que van. tin dung hoc tang"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("dung toi luan va. tac trung hoc mo") OR ("dung thi que van. tin dung hoc tang")).
• Removing quotes may allow a broader search: (( dung toi luan va. tac trung hoc mo ) or ( dung thi que van. tin dung hoc tang )).
• Adding a wildcard symbol may retrieve word variants: (("dung toi luan va. tac trung hoc mo") or ("dung thi que van. tin dung hoc tang"))*.