Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
nhan luc » nang luc
van nhan » van phan, van thanh, danh nhan
hieu van » hieu va, thien van, lieu va
van nang » van quang, van ban, van dong
tu sach » thu sach, su sach, tu cach
va hanh » van hanh, va thanh, va danh
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, voi nang
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)) ((v nang) OR (van nang)) xa hoi. hieu van nhan luc va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ((v nang) OR (van nang)) xa hoi. hieu van nhan luc va hanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ((v nang) OR (van nang)) xa hoi. hieu van nhan luc va hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ((v nang) OR (van nang)) xa hoi. hieu van nhan luc va hanh dai cua tre*.