Perhaps you should try some spelling variations:
thuc nguoi » toc nguoi
nguoi san » nguoi tay, nguoi dao, nguoi ma
san hanh » san thanh, ban hanh, van hanh
de thuc » den thuc, do thuc, ve thuc
cua tre » cuu tre, cua triet, dua tren
su sach » so sach, vu sach
hanh di » hanh vi, hanh de, hang di
hieu de » hieu ve, hieu he, hieu le
su sac » su cac, su xac
nang o » nang co, nang ho, nang ro
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) OR (su sach)) ky nang o hoi. hieu de thuc nguoi san hanh di ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su sach)) ky nang o hoi. hieu de thuc nguoi san hanh di ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su sach)) ky nang o hoi. hieu de thuc nguoi san hanh di ((cua tre) or (cua te))*".