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