Perhaps you should try some spelling variations:
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
van tham » van thanh, van tuan, van chat
tham tuc » tham thuc, thai tuc, nham thuc
van dinh » van minh, va dinh, xuan dinh
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
dau cua » dai cua, day cua, cau cua
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang xa hoi. thien van tham tuc ((van dinh) OR (van dich)) dau cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang xa hoi. thien van tham tuc ((van dinh) OR (van dich)) dau cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. thien van tham tuc ((van dinh) OR (van dich)) dau cua tre*.