Perhaps you should try some spelling variations:
hanh dinh » thanh dinh, hinh dinh, hanh tinh
dinh cuu » dinh chi
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, bo sach, co sach
tuc van » thuc van, truc van, tuc va
dau tuc » dau tu, dao tuc, cau truc
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
vu sach » vu bach, su sach, vu khach
cuu tre » cua tre, cau tren, cau treo
va dau » va dao

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) or (vu sach)) ty ((nang xa) OR (nang ma)) hoi. lieu va dau tuc van hanh dinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (vu sach)) ty ((nang xa) OR (nang ma)) hoi. lieu va dau tuc van hanh dinh cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (vu sach)) ty ((nang xa) OR (nang ma)) hoi. lieu va dau tuc van hanh dinh cuu tre*".