Perhaps you should try some spelling variations:
"su sach thiet ke gioi hon thong tin" » "su sach thieu ke gioi hon thong tin", "su cach thiet ke gioi hon thong tin", "su hanh thiet ke gioi hon thong tin", "su sach thiet ke gioi hoa thong tin", "su sach thiet ke gioi hoc thong tin", "su sach thiet ke gioi hoi thong tin", "su sach thiet ke gio hon thong tin", "su sach thiet ke gioi bon thong tin", "su sach thiet ke gioi han thong tin", "so sach thiet ke gioi hon thong tin", "vu sach thiet ke gioi hon thong tin", "su sach thiet ke giai hon thong tin", "su sach thiet ve gioi hon thong tin"
"su sach do ke nguoi nhat nhan vien" » "su sach do ke nguoi thai nhan vien", "su sach do ke nguoi cham nhan vien", "su sach do ke nguon nhan nhan vien", "su sach do ke nguoi hat nhan vien", "su sach do ke nguoi nhap nhan vien", "su sach do ke nguoi nhac nhan vien", "su sach do le nguoi nhat nhan vien", "su sach do ky nguoi nhat nhan vien", "su sach do me nguoi nhat nhan vien", "so sach do ke nguoi nhat nhan vien", "vu sach do ke nguoi nhat nhan vien", "su sach dao ke nguoi nhat nhan vien", "su sach doi ke nguoi nhat nhan vien", "su sach de ke nguoi nhat nhan vien", "su sach do ke nguoi nhat nhan viet", "su sach do ke nguoi nhat nhan bien"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("su sach thiet ke gioi hon thong tin") or ("su sach do ke nguoi nhat nhan vien"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("su sach thiet ke gioi hon thong tin") OR ("su sach do ke nguoi nhat nhan vien")).
• Removing quotes may allow a broader search: (( su sach thiet ke gioi hon thong tin ) or ( su sach do ke nguoi nhat nhan vien )).
• Adding a wildcard symbol may retrieve word variants: (("su sach thiet ke gioi hon thong tin") or ("su sach do ke nguoi nhat nhan vien"))*.