Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
nhan luc » nang luc
su sach » so sach, vu sach
va nhan » van nhan, ca nhan, va phan
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
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: ((su sach) or (te sach)) ky lang xa hoi. hieu va nhan luc ((ban thanh) or (gia thanh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) ky lang xa hoi. hieu va nhan luc ((ban thanh) OR (gia thanh)) di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) ky lang xa hoi. hieu va nhan luc ((ban thanh) or (gia thanh)) di cua tre*.