Perhaps you should try some spelling variations:
phat luc » nhan luc, phat huy, chat lua
so sach » so sanh, bo sach, co sach
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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 (tu sach)) ky nang ((mai hoi) or (xa hoi)). hieu va phat luc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (tu sach)) ky nang ((mai hoi) OR (xa hoi)). hieu va phat luc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (tu sach)) ky nang ((mai hoi) or (xa hoi)). hieu va phat luc va hanh vi cua tre*.