Perhaps you should try some spelling variations:
thanh bac » nhanh bac, thanh bai, thanh san
hanh bac » nhanh bac, hanh cac, danh bac
van hanh » van thanh, ban hanh, van anh
hanh tri » thanh tri, hanh tai, hanh trinh
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
nang xa » nang x, lang xa, nang ma
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet

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 (co sach)) ky nang xa hoi. thi ((hanh bac) or (thanh bac)) xuc van hanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ky nang xa hoi. thi ((hanh bac) OR (thanh bac)) xuc van hanh tri cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (co sach)) ky nang xa hoi. thi ((hanh bac) or (thanh bac)) xuc van hanh tri cua tre".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (co sach)) ky nang xa hoi. thi ((hanh bac) or (thanh bac)) xuc van hanh tri cua tre*.