Perhaps you should try some spelling variations:
sach tranh » canh tranh
sach tran » sach tren, vach tran, sach tham
trenh tri » trang tri, tren thi, thanh tri
trung tri » trang tri, trung tran, trung tam
tranh tri » trang tri, thanh tri, trang trai
tran tri » trang tri, tran thi, trang trai
te sach » toc sach
su sach » so sach
vu sach » vu bach, vu khach

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tran tri ) OR ((( su sach ((trenh tri) OR (trung tri)) ) OR ( vu sach tranh tri ))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( te sach tran tri ) or ((( su sach ((trenh tri) OR (trung tri)) ) or ( vu sach tranh tri ))))~".
• Adding a wildcard symbol may retrieve word variants: (( te sach tran tri ) or ((( su sach ((trenh tri) OR (trung tri)) ) or ( vu sach tranh tri ))))*.