Perhaps you should try some spelling variations:
nguong sach » duong sach, nguoi sach, luong sach
sach nghe » sach nghiep, sach nha, anh nghe
pho thong » he thong
sach nham » sach nha, sach tham, sach han
nham thuc » nhan thuc, nam thuc, nham thu
phu thong » phap thong, khau thong, phan thong
hoc sach » hoc sinh, hoc cac, hoc anh
sach tin » sach tien, sach kinh, sach tren
nghe pho » nghe cho, nghe phan, nghe khoa
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
khoa phu » khoa phau, khoa thu, hoa phu
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( hoc sach tin nguong sach nghe pho thong ) or ( te sach nham thuc anh khoa phu thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( hoc sach tin nguong sach nghe pho thong ) OR ( te sach nham thuc anh khoa phu thong )).
• Adding a wildcard symbol may retrieve word variants: (( hoc sach tin nguong sach nghe pho thong ) or ( te sach nham thuc anh khoa phu thong ))*.