Perhaps you should try some spelling variations:
"nhung thoi quyet van. thoi nguyen tuan lap" » "nhung thoi quyet van. thai nguyen tuan lap", "nhung thoi quyet van. thi nguyen tuan lap", "nhung thoi quyet van. tuoi nguyen tuan lap", "nhung thoi quyet van. thoi nguyen xuan lap", "nhung thoi quyet van. thoi nguyen thanh lap", "nhung thoi quyet van. thoi nguyen quang lap", "nhung thi quyet van. thoi nguyen tuan lap", "nhung loi quyet van. thoi nguyen tuan lap", "nhung tri quyet van. thoi nguyen tuan lap", "nhung toi quyet van. thoi nguyen tuan lap", "nhung theo quyet van. thoi nguyen tuan lap", "nhung thi tuyet van. thoi nguyen tuan lap", "nhung thoi quyet van. thoi nguyen toan lap", "nhung thoi quyet van. thoi nguyen quan lap", "nhung thoi quyet van. thoi nguyen luan lap"
"phung thi xuan van. thoi quen cua lam" » "phung thi xa van. thoi quen cua lam", "phung thi lan van. thoi quen cua lam", "phung thi luan van. thoi quen cua lam", "phung thi quan van. thoi quen cua lam", "phung thi xuan can. thoi quen cua lam", "phung thi xuan van. thoi quyen cua lam", "phung thi xuan van. thoi quan cua lam", "phung thi xuan van. thoi duyen cua lam", "phung thi xuan van. thoi quen cua tam", "phung thi xuan van. thoi quen cua nam", "phung thi xuan van. thoi quen cua am"

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