Perhaps you should try some spelling variations:
"nhung thi luan van. thoi nguyen vu lai" » "nhung thi luan van. thai nguyen vu lai", "nhung thi luan van. thi nguyen vu lai", "nhung thi luan van. tuoi nguyen vu lai", "phung thi luan van. thoi nguyen vu lai", "nhung tri luan van. thoi nguyen vu lai", "nhung chi luan van. thoi nguyen vu lai", "nhung thi luan van. thoi nguyen tu lai", "nhung thi luan van. thoi nguyen van lai", "nhung thi luan van. thoi nguyen duc lai", "nhung thi lan van. thoi nguyen vu lai", "nhung thi xuan van. thoi nguyen vu lai", "nhung thi loan van. thoi nguyen vu lai", "nhung thi luan van. thoi nguyen vu hai", "nhung thi luan van. thoi nguyen vu dai", "nhung thi luan van. thoi nguyen vu tai"
"nhung thoi quen vang. thi yen truc lap" » "phung thi quen vang. thi yen truc lap", "nhung loi quen vang. thi yen truc lap", "nhung tri quen vang. thi yen truc lap", "nhung thoi quan van. thi yen truc lap", "nhung thoi que van. thi yen truc lap", "nhung thoi que lang. thi yen truc lap", "nhung thoi quen vang. thi kien truc lap", "nhung thoi quen vang. thi yen tu lap", "nhung thoi quen vang. thi yen truc va", "nhung thoi quen vang. thi yen truc may"

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: (("nhung thoi quen vang. thi yen truc lap") OR ("nhung thi luan van. thoi nguyen vu lai"))~.
• Removing quotes may allow a broader search: (( nhung thoi quen vang. thi yen truc lap ) or ( nhung thi luan van. thoi nguyen vu lai ))~.
• Adding a wildcard symbol may retrieve word variants: (("nhung thoi quen vang. thi yen truc lap") or ("nhung thi luan van. thoi nguyen vu lai"))*.