Perhaps you should try some spelling variations:
chet duoc » che duoc, cho duoc, che quoc
nhan tri » nhan tai, nhanh thi, thanh tri
sach ky » sac ky, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
va chet » va chiet, va che, va chat
duoc ca » duoc cac, duoc ma, duoc va
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sach y)) lang xa hoi. lieu va chet duoc ca nhan tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) lang xa hoi. lieu va chet duoc ca nhan tri cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach y)) lang xa hoi. lieu va chet duoc ca nhan tri cua tre*.