Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
dang xay » dang van, van xay
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
cam luc » cau luc
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet

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: tu sach y ((nang ma) OR (dang xay)) hoi. hieu qua ((cam luc) OR (cam xuc)) gia thanh lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang ma) or (dang xay)) hoi. hieu qua ((cam luc) OR (cam xuc)) gia thanh lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang ma) or (dang xay)) hoi. hieu qua ((cam luc) OR (cam xuc)) gia thanh lai cua tre*.