Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh hai » thanh phan, thanh hoa, thanh san
su triet » su viet, su tien, ve triet
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cac tuc » cac toc, cac tu, cac tac
tuc ban » thuc ban, truc ban, tu ban
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu

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 ky nang xa hoi. lieu va cac tuc ban thanh hai ((((cua tre) OR (cua te))) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. lieu va cac tuc ban thanh hai ((((cua tre) OR (cua te))) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. lieu va cac tuc ban thanh hai ((((cua tre) OR (cua te))) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. lieu va cac tuc ban thanh hai ((((cua tre) OR (cua te))) or (su triet))*.