Perhaps you should try some spelling variations:
hanh dinh » thanh dinh, hinh dinh, hanh tinh
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
tan hanh » tan thanh, tang hanh, toan hanh
dinh cuu » dinh chi
ky danh » ky anh
ky dang » ky nang
van bac » van ban, van bao, van hac
bac dac » bac dai, ban dac, bac dan
dac tan » duc tan, dac san, dai tan
cuu tre » cua tre, cau tren, cau treo

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 danh) or (ky dang)) xa hoi. hieu van bac dac tan hanh dinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ky danh) OR (ky dang)) xa hoi. hieu van bac dac tan hanh dinh cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ((ky danh) or (ky dang)) xa hoi. hieu van bac dac tan hanh dinh cuu tre*.