Perhaps you should try some spelling variations:
"nhung noi qua van. thoi nguyen tuan lap" » "nhung noi qua van. thai nguyen tuan lap", "nhung noi qua van. thi nguyen tuan lap", "nhung noi qua van. tuoi nguyen tuan lap", "nhung noi qua van. thoi nguyen xuan lap", "nhung noi qua van. thoi nguyen thanh lap", "nhung noi qua van. thoi nguyen quang lap", "nhung loi qua van. thoi nguyen tuan lap", "nhung nguoi qua van. thoi nguyen tuan lap", "nhung nghi qua van. thoi nguyen tuan lap", "nhung noi qua van. thoi nguyen toan lap", "nhung noi qua van. thoi nguyen quan lap", "nhung noi qua van. thoi nguyen luan lap", "nhung noi quan van. thoi nguyen tuan lap", "nhung hoi qua van. thoi nguyen tuan lap", "nhung noi cua van. thoi nguyen tuan lap", "nhung noi qua ban. thoi nguyen tuan lap", "nhung noi 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 noi 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 noi qua van. thoi nguyen tuan lap") OR ("phung thi quan luan. thoi quen cua lap")).
• Removing quotes may allow a broader search: (( nhung noi qua van. thoi nguyen tuan lap ) or ( phung thi quan luan. thoi quen cua lap )).
• Adding a wildcard symbol may retrieve word variants: (("nhung noi qua van. thoi nguyen tuan lap") or ("phung thi quan luan. thoi quen cua lap"))*.