Perhaps you should try some spelling variations:
hanh tri » thanh tri, hanh tai, hanh trinh
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
tu ang » tu lang, tu anh, tu quang
tu anc » tu anco, tu anh
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va

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 ((tu ang) OR (tu anc)) xa hoi. hieu va cam luc va hanh tri cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tu ang) OR (tu anc)) xa hoi. hieu va cam luc va hanh tri cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((tu ang) OR (tu anc)) xa hoi. hieu va cam luc va hanh tri cua tre*.