Perhaps you should try some spelling variations:
"nhung tri luan van. doi tuong hoc mot" » "nhung bai luan van. doi tuong hoc mot", "dung tri luan van. doi tuong hoc mot", "nhung bi luan van. doi tuong hoc mot", "nhung tri luan van. moi truong hoc mot", "nhung tri luan van. doi song hoc mot", "nhung tri luan van. doi truong hoc mot", "nhung tri luan van. doi tuong ho mot", "nhung tri luan van. doi duong hoc mot", "nhung tri quan van. doi tuong hoc mot", "nhung thi luan van. doi tuong hoc mot", "nhung tri tuan van. doi tuong hoc mot", "nhung tri luan van. doi tuong hoc moi"
"nhung thi quen vang. boi dong cong dong" » "nhung thoi quen vang. boi dong cong dong", "phung thi quen vang. boi dong cong dong", "nhung chi quen vang. boi dong cong dong", "nhung thi quan van. boi dong cong dong", "nhung thi que van. boi dong cong dong", "nhung thi que lang. boi dong cong dong", "nhung thi quen vang. boi duong cong dong", "nhung thi quen vang. boi dung cong dong", "nhung thi quen vang. boi dang cong dong", "nhung thi quan vang. boi dong cong dong", "nhung thi huyen vang. boi dong cong dong", "nhung thi quen vang. hoi dong cong dong", "nhung thi quen vang. bi dong cong dong"

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: (("nhung tri luan van. doi tuong hoc mot") or ("nhung thi quen vang. boi dong cong dong"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("nhung tri luan van. doi tuong hoc mot") OR ("nhung thi quen vang. boi dong cong dong")).
• Removing quotes may allow a broader search: (( nhung tri luan van. doi tuong hoc mot ) or ( nhung thi quen vang. boi dong cong dong )).
• Adding a wildcard symbol may retrieve word variants: (("nhung tri luan van. doi tuong hoc mot") or ("nhung thi quen vang. boi dong cong dong"))*.