Perhaps you should try some spelling variations:
"phung thi luan van. noi trung quoc lo" » "phung thi luan van. doi trung quoc lo", "phung thi luan van. nhi trung quoc lo", "phung thi luan van. hoi trung quoc lo", "phung thi lan van. noi trung quoc lo", "phung thi xuan van. noi trung quoc lo", "phung thi loan van. noi trung quoc lo", "phung thi luan van. noi trung quoc co", "phung thi luan van. noi trung quoc o", "phung thi luan van. noi trung quoc so"
"phung thi luan van. noi dung thuoc so" » "phung thi lan van. noi dung thuoc so", "phung thi xuan van. noi dung thuoc so", "phung thi loan van. noi dung thuoc so", "phung thi luan van. hoc dung thuoc so", "phung thi luan van. noi dung thuoc bo", "phung thi luan van. noi dung thuoc ho", "phung thi luan van. noi dung thuoc co"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("phung thi luan van. noi trung quoc lo") or ("phung thi luan van. noi dung thuoc so"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("phung thi luan van. noi trung quoc lo") OR ("phung thi luan van. noi dung thuoc so")).
• Removing quotes may allow a broader search: (( phung thi luan van. noi trung quoc lo ) or ( phung thi luan van. noi dung thuoc so )).
• Adding a wildcard symbol may retrieve word variants: (("phung thi luan van. noi trung quoc lo") or ("phung thi luan van. noi dung thuoc so"))*.