Perhaps you should try some spelling variations:
thuc nguoi » toc nguoi
san hanh » san thanh, ban hanh, dan hanh
van hanh » van thanh, ban hanh, van anh
hieu ly » hieu ky, lieu ly, dieu ly
ly thuc » ly thuoc, ly thu, ly thue
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu ly thuc nguoi ((san hanh) OR (van hanh)) di ((cua tre) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang x hoi. hieu ly thuc nguoi ((san hanh) OR (van hanh)) di ((cua tre) OR (cua tu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang x hoi. hieu ly thuc nguoi ((san hanh) OR (van hanh)) di ((cua tre) or (cua tu))*".