Perhaps you should try some spelling variations:
"nhung thoi quyet van. thi nguyen xuan lai" » "nhung thoi quyet van. thi nguyen van lai", "nhung thi quyet van. thi nguyen xuan lai", "nhung loi quyet van. thi nguyen xuan lai", "nhung tri quyet van. thi nguyen xuan lai", "nhung toi quyet van. thi nguyen xuan lai", "nhung theo quyet van. thi nguyen xuan lai", "nhung thoi quen van. thi nguyen xuan lai", "nhung thoi quyet van. thai nguyen xuan lai", "nhung thoi quyet van. tai nguyen xuan lai", "nhung thoi quyet van. thi nguyet xuan lai", "nhung thoi quyet van. thi nguyen xuan mai", "nhung thoi quyet van. thi nguyen xuan loi", "nhung thoi quyet van. thi nguyen xuan thai"
"phung thi xuan van. cho quen cua tap" » "phung thi xa van. cho quen cua tap", "phung thi lan van. cho quen cua tap", "phung thi luan van. cho quen cua tap", "phung thi quan van. cho quen cua tap", "phung thi xuan can. cho quen cua tap", "phung thi xuan van. cho que cua tap", "phung thi xuan van. thoi quen cua tap", "phung thi xuan van. cao quyen cua tap", "phung thi xuan van. cho quyen cua tap", "phung thi xuan van. cho quan cua tap", "phung thi xuan van. cho duyen cua tap", "phung thi xuan van. cho quen cua tam", "phung thi xuan van. cho quen cua phap"

Try widening your search to All Fields.

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