Perhaps you should try some spelling variations:
thieu bang » thien bang, thieu khang, thieu quang
van hanh » van thanh, ban hanh, van anh
su sach » so sach
vu sach » vu bach, vu khach
bang xa » lang xa, bang va, mang xa
dau tuc » dau tu, dao tuc, cau truc
tuc van » thuc van, truc van, tuc va
cua tre » cua te, cuu tre, cua triet
va dau » va dao
vi cua » vai cua, di cua

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) OR (vu sach)) thieu bang xa hoi. lieu va dau tuc van hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) thieu bang xa hoi. lieu va dau tuc van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) thieu bang xa hoi. lieu va dau tuc van hanh vi cua tre*.