Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
cua triet » cua viet, su triet, va triet
dang xay » dang van, van xay
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
qua cam » qua cham, qua cac, qua ca
cam luc » cam xuc, cau luc
luc gia » luoc gia, duc gia, quoc gia
cua tre » cua te, cuu tre, dua tren

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 gia thanh lai ((cua tre) OR (cua triet))~.
• 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 gia thanh lai ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang ma) or (dang xay)) hoi. hieu qua cam luc gia thanh lai ((cua tre) OR (cua triet))*.