Perhaps you should try some spelling variations:
thi nang » thi cong, ki nang
thi hanh » thi thanh
ban hanh » ban hang
hanh tri » thanh tri, hanh tai, hanh trinh
nang xa » nang x, lang xa, nang ma
thi van » thi lan
vuc ban » vu ban, duc ban, cuc ban
cua tre » cua te, cuu tre, cua triet
so sac » so sach, so dac
sac ky » cac ky, sai ky

You may be able to get more results by adjusting your search query.

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