Perhaps you should try some spelling variations:
"tu sach ban tuyen Đai hoc fpt" » "tu sach ban huyen Đai hoc fpt", "tu sach van tuyen Đai hoc fpt", "tu sach ban tuyet Đai hoc fpt", "tu sach bai tuyen Đai hoc fpt", "tu sach bac tuyen Đai hoc fpt", "tu sach bao tuyen Đai hoc fpt", "thu sach ban tuyen Đai hoc fpt", "su sach ban tuyen Đai hoc fpt", "te sach ban tuyen Đai hoc fpt"
"tu sach han tuyen Đai hoc fpt" » "tu sach han truyen Đai hoc fpt", "tu sach hanh tuyen Đai hoc fpt", "tu sach phan tuyen Đai hoc fpt", "tu sach tham tuyen Đai hoc fpt", "tu sach danh tuyen Đai hoc fpt", "tu sach nang tuyen Đai hoc fpt", "thu sach han tuyen Đai hoc fpt", "su sach han tuyen Đai hoc fpt", "te sach han tuyen Đai hoc fpt"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("tu sach ban tuyen Đai hoc fpt") OR ("tu sach han tuyen Đai hoc fpt"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"tu sach ban tuyen Đai hoc fpt\") OR (\"tu sach han tuyen Đai hoc fpt\"))".
• Removing quotes may allow a broader search: (( tu sach ban tuyen Đai hoc fpt ) OR ( tu sach han tuyen Đai hoc fpt )).
• Adding a wildcard symbol may retrieve word variants: (("tu sach ban tuyen Đai hoc fpt") OR ("tu sach han tuyen Đai hoc fpt"))*.