Perhaps you should try some spelling variations:
"nhung loi qua van. thoi nguyen tuan lap" » "nhung loi qua van. thai nguyen tuan lap", "nhung loi qua van. thi nguyen tuan lap", "nhung loi qua van. tuoi nguyen tuan lap", "nhung loi qua van. thoi nguyen xuan lap", "nhung loi qua van. thoi nguyen thanh lap", "nhung loi qua van. thoi nguyen quang lap", "nhung bai qua van. thoi nguyen tuan lap", "nhung bi qua van. thoi nguyen tuan lap", "nhung gi qua van. thoi nguyen tuan lap", "nhung loi qua van. thoi nguyen toan lap", "nhung loi qua van. thoi nguyen quan lap", "nhung loi qua van. thoi nguyen luan lap", "nhung hoi qua van. thoi nguyen tuan lap", "nhung loi que van. thoi nguyen tuan lap", "nhung loi hua van. thoi nguyen tuan lap", "nhung loi quan van. thoi nguyen tuan lap", "nhung loi qua ban. thoi nguyen tuan lap", "nhung loi qua san. thoi nguyen tuan lap"
"phung thi quan luan. thoi quen cua lap" » "phung thi xuan luan. thoi quen cua lap", "phung tri quan luan. thoi quen cua lap", "phung thi luan luan. thoi quen cua lap", "phung thi quan luan. thoi quyen cua lap", "phung thi quan luan. thoi quan cua lap", "phung thi quan luan. thoi duyen cua lap", "phung thi quan luan. thoi quen chua lap", "phung thi quan luan. thoi quen cua tap", "phung thi quan luan. thoi quen cua lam"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("nhung loi qua van. thoi nguyen tuan lap") or ("phung thi quan luan. thoi quen cua lap"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("nhung loi qua van. thoi nguyen tuan lap") OR ("phung thi quan luan. thoi quen cua lap")).
• Removing quotes may allow a broader search: (( nhung loi qua van. thoi nguyen tuan lap ) or ( phung thi quan luan. thoi quen cua lap )).
• Adding a wildcard symbol may retrieve word variants: (("nhung loi qua van. thoi nguyen tuan lap") or ("phung thi quan luan. thoi quen cua lap"))*.