Perhaps you should try some spelling variations:
hanh tri » thanh tri, hanh tai, hanh trinh
su sach » so sach
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
vu sach » vu bach, vu khach
tu ang » tu lang, tu anh, tu quang
qua ca » qua cac, qua cua, qua cai
ca luc » cau luc, ca lua
luc va » duc va, tuc va, loc va
tu anc » tu anco, tu anh

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 (vu sach)) ((tu ang) or (tu anc)) xa hoi. hieu qua ca luc va hanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ((tu ang) OR (tu anc)) xa hoi. hieu qua ca luc va hanh tri cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ((tu ang) or (tu anc)) xa hoi. hieu qua ca luc va hanh tri cua tre*.