Perhaps you should try some spelling variations:
nguoi cong » nguoi muong, nguoi thong, nguoi nung
cong thong » cong thuong, cong trong, dong thong
sach cha » sach nha, sach che, sach ha
me nguoi » ma nguoi, le nguoi, ke nguoi
con hong » cong khong, cong cong, con duong
con song » can song, cuoc song, cong dong
so sach » so sanh, bo sach, co sach
tu sach » thu sach, su sach, te sach
ve gioi » ve giai, vien gioi, van gioi
cha ve » ca ve, pha ve, cha va

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

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