Perhaps you should try some spelling variations:
toc nguoi » con nguoi
nguoi lam » nguoi lao, nguoi nam, nguoi la
lam tdong » lam dong, lam trong, lam truong
tdong tin » thong tin, dong tin, trong tin
hong tin » thong tin, hong tien, dong tin
sach bai » sach dao, cac bai
con hong » con song, cong thong, cong khong
giai con » gian con, giai doan, giao cong
sach bac » sach dao, sach cap, sach dat
sach xa » sach dao, sach nha
de giai » dan giai, kem giai
bai toc » bai hoc, bai doc, bai thuoc
tu sach » thu sach, su sach, te sach

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 bai toc nguoi lam tdong tin ) or ( tu ((sach bac) or (sach xa)) de giai con hong tin ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach bai toc nguoi lam tdong tin ) OR ( tu ((sach bac) OR (sach xa)) de giai con hong tin )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach bai toc nguoi lam tdong tin ) or ( tu ((sach bac) or (sach xa)) de giai con hong tin ))*.