Perhaps you should try some spelling variations:
"dung thuoc quyen van. biet the hien cam xuc" » "dung thuoc chuyen van. biet the hien cam xuc", "dung thuoc nguyen van. biet the hien cam xuc", "dung hoc quyen van. biet the hien cam xuc", "dung thuoc quyet van. biet the hien cam xuc", "dung thuoc huyen van. biet the hien cam xuc", "dung thuoc quyen van. biet the hien cac xuc", "dung thuoc quyen van. biet the hien cau xuc", "dung thuoc quyen van. biet the hien giam xuc"
"phung thi luan va. biet the hien cam xuc" » "phung thi luan va. biet the hien cac xuc", "phung thi luan va. biet the hien cau xuc", "phung thi luan va. biet the hien giam xuc", "phung thi lan va. biet the hien cam xuc", "phung thi xuan va. biet the hien cam xuc", "phung thi loan va. biet the hien cam xuc", "phung thi luan van. biet the hien cam xuc", "phung thi luat va. biet the hien cam xuc"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("dung thuoc quyen van. biet the hien cam xuc") OR ("phung thi luan va. biet the hien cam xuc"))~.
• Removing quotes may allow a broader search: (( dung thuoc quyen van. biet the hien cam xuc ) or ( phung thi luan va. biet the hien cam xuc ))~.
• Adding a wildcard symbol may retrieve word variants: (("dung thuoc quyen van. biet the hien cam xuc") or ("phung thi luan va. biet the hien cam xuc"))*.