Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van ban
su sach » vu sach
van anh » van thanh, tuan anh, van minh
dau tuc » dau tu, dao tuc, cau truc
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
so sach » so sanh, bo sach, co sach
di cuu » di cau, di cua, dinh cuu
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)) ty nang xa hoi. lieu va dau tuc ((van hanh) or (van anh)) di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ty nang xa hoi. lieu va dau tuc ((van hanh) OR (van anh)) di cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ty nang xa hoi. lieu va dau tuc ((van hanh) or (van anh)) di cuu tre*".