Perhaps you should try some spelling variations:
khoan nguoi » hoa nguoi, hon nguoi, khoan nhoi
nguoi thong » nguoi muong, nguoi thanh
nguoi cong » nguoi muong, nguoi nung, nguoi co
sach tren » sach tien, sach tranh
tren tue » tren que, tren thuc, tri tue
sach bai » sach dao, cac bai, sach xa
tu sach » thu sach, su sach, te sach
tue cac » tu cac, tuc cac
so sach » so sanh, bo sach, co sach
bai te » bai tu
te cac » tu cac, ve cac, te cao

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 tren tue cac khoan nguoi thong ) or ( so sach bai te cac khoan nguoi cong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tren tue cac khoan nguoi thong ) OR ( so sach bai te cac khoan nguoi cong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tren tue cac khoan nguoi thong ) or ( so sach bai te cac khoan nguoi cong ))*.