Perhaps you should try some spelling variations:
nhan luc » nang luc
vu sach » vu bach, su sach, vu khach
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (tu sach)) ky nang x ho. hieu va nhan luc ((le thanh) or (va tinh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (tu sach)) ky nang x ho. hieu va nhan luc ((le thanh) OR (va tinh)) di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (tu sach)) ky nang x ho. hieu va nhan luc ((le thanh) or (va tinh)) di cua tre*.