Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van ban
thu nang » thi nang, thu hang, thu bang
su sach » vu sach
dau tuc » dau tu, dao tuc, cau truc
van anh » van thanh, tuan anh, van minh
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
vi cua » vai cua, di cua
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: ((su sach) or (so sach)) thu nang xa hoi. lieu va dau tuc ((van hanh) OR (van anh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) thu nang xa hoi. lieu va dau tuc ((van hanh) OR (van anh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) thu nang xa hoi. lieu va dau tuc ((van hanh) OR (van anh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) thu nang xa hoi. lieu va dau tuc ((van hanh) OR (van anh)) vi cua tre*.