Perhaps you should try some spelling variations:
hanh tri » thanh tri, hanh tai, hanh trinh
chat luc » chat xuc, chat lua, nhan luc
van chat » cao chat
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
te sach » toc sach
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: ((tu sach) OR (te sach)) tu ((nang xa) or (nang x)) hoi. hieu van chat luc va hanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) tu ((nang xa) OR (nang x)) hoi. hieu van chat luc va hanh tri cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) tu ((nang xa) or (nang x)) hoi. hieu van chat luc va hanh tri cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) tu ((nang xa) or (nang x)) hoi. hieu van chat luc va hanh tri cua tre*.