Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
nham thuc » nhan thuc, nam thuc, nham thu
thu sach » tu sach, thuat sach, thuoc sach
sach thi » sach thu, sach tai, sach thieu
ha thanh » va thanh, pham thanh, phan thanh
cua tre » cua te, cuu tre, cua triet
thuc ha » thu ha, thuc va, thuc hanh
ve nham » ve nha, ve cham
hieu ve » hieu va, hieu van
hang ca » hang va, nang cao, hang tai
hang xa » hoang xa, hang va, lang xa
su tien » su kien, su hien, tu tieng

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: thu sach thi ((hang xa) OR (hang ca)) hoi. hieu ve nham thuc ha thanh lai ((cua tre) OR (su tien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach thi ((hang xa) OR (hang ca)) hoi. hieu ve nham thuc ha thanh lai ((cua tre) or (su tien))~".
• Adding a wildcard symbol may retrieve word variants: thu sach thi ((hang xa) OR (hang ca)) hoi. hieu ve nham thuc ha thanh lai ((cua tre) or (su tien))*.