Perhaps you should try some spelling variations:
"nhung thoi quen vang. boi dung hoc mot" » "nhung thi quen vang. boi dung hoc mot", "nhung loi quen vang. boi dung hoc mot", "nhung tri quen vang. boi dung hoc mot", "nhung thoi quan van. boi dung hoc mot", "nhung thoi que van. boi dung hoc mot", "nhung thoi que lang. boi dung hoc mot", "nhung thoi quen vang. boi duong hoc mot", "nhung thoi quen vang. noi dung hoc mot", "nhung thoi quen vang. hoi dung hoc mot", "nhung thoi quen vang. boi dong hoc mot", "nhung thoi quen vang. boi dung thuoc mot", "nhung thoi quen vang. boi trung hoc mot", "nhung thoi quen vang. boi dung hoc moi"
"phung thi luan van. doi tuong hoc mon" » "phung thi luan van. moi truong hoc mon", "phung thi luan van. doi song hoc mon", "phung thi luan van. doi truong hoc mon", "phung thi luan van. doi tuong ho mon", "phung thi luan van. doi duong hoc mon", "phung thi lan van. doi tuong hoc mon", "phung thi xuan van. doi tuong hoc mon", "phung thi loan van. doi tuong hoc mon", "phung thi luan van. doi tuong hoc moi", "phung thi luan van. doi tuong hoc cong", "phung thi luan van. doi tuong hoc bong"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("nhung thoi quen vang. boi dung hoc mot") or ("phung thi luan van. doi tuong hoc mon"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("nhung thoi quen vang. boi dung hoc mot") OR ("phung thi luan van. doi tuong hoc mon")).
• Removing quotes may allow a broader search: (( nhung thoi quen vang. boi dung hoc mot ) or ( phung thi luan van. doi tuong hoc mon )).
• Adding a wildcard symbol may retrieve word variants: (("nhung thoi quen vang. boi dung hoc mot") or ("phung thi luan van. doi tuong hoc mon"))*.