Perhaps you should try some spelling variations:
cong thong » cong thuong, cong trong, dong thong
giai cong » gia cong, giao cong, giai phong
nguoi bo » nguoi do, nguoi o, nguoi ba
nguoi co » nguoi do, nguoi dao, nguoi moi
tu sach » thu sach, te sach, tu cach
sach ha » sach nha, sach han, sach xa
le giai » de giai, ly giai, ve giai
su sach » so sach, vu sach
ha le » va le
ha me » cha me, ba me, ca me

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach ha le giai cong thong tin ) or ( su sach ha me ((nguoi bo) OR (nguoi co)) thong tin ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach ha le giai cong thong tin ) OR ( su sach ha me ((nguoi bo) OR (nguoi co)) thong tin )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu sach ha le giai cong thong tin ) or ( su sach ha me ((nguoi bo) OR (nguoi co)) thong tin ))".
• Adding a wildcard symbol may retrieve word variants: (( tu sach ha le giai cong thong tin ) or ( su sach ha me ((nguoi bo) OR (nguoi co)) thong tin ))*.