Perhaps you should try some spelling variations:
hanh tri » thanh tri, hanh tai, hanh trinh
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
cac tuc » cac toc, cac tu, cac tac
xa hanh » xa thanh, xa khanh, va hanh
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: ((((tu sach) or (su sach))) or (thu hoach)) ky nang xa hoi. hieu qua cac tuc xa hanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (su sach))) OR (thu hoach)) ky nang xa hoi. hieu qua cac tuc xa hanh tri cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (su sach))) or (thu hoach)) ky nang xa hoi. hieu qua cac tuc xa hanh tri cua tre*.