Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
van hanh » ban hanh, van anh, van ban
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
dau tuc » dau tu, dao tuc, cau truc
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
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 thu nang xa hoi. lieu va dau tuc ((van hanh) OR (van thanh)) vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thu nang xa hoi. lieu va dau tuc ((van hanh) OR (van thanh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach thu nang xa hoi. lieu va dau tuc ((van hanh) OR (van thanh)) vai cua tre*.