Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
vat thanh » dat thanh, gat thanh, tat thanh
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, dua tren
va cau » van cau, va dau, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang xa hoi. hieu ((va cau) OR (va cac)) thuc vat thanh van ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ((va cau) OR (va cac)) thuc vat thanh van ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((va cau) OR (va cac)) thuc vat thanh van ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ((va cau) OR (va cac)) thuc vat thanh van ((cua tre) or (cua triet))*.