Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh hai » thanh phan, thanh hoa, thanh san
cua triet » cua viet, su triet, va triet
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
nuoc ban » nuoc san, quoc ban, buoc ban
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua tre » cua te, dua tren, cua thep
cuu tre » cau tren, cau treo
ve cac » va cac, vien cac

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. hieu ve cac nuoc ban thanh hai ((((cua tre) or (cuu tre))) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. hieu ve cac nuoc ban thanh hai ((((cua tre) OR (cuu tre))) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. hieu ve cac nuoc ban thanh hai ((((cua tre) or (cuu tre))) or (cua triet))*.