Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
sach tren » sach tien, sach tranh
tren thuc » trien thuc, tron thuc, trinh thuc
khoa phau » hoa phan, khoa kham, khoa than
thuc cac » thuc cach, tuc cac, phuc cac
khoan he » khoa he, khoan ke, khoan le
sanh tri » thanh tri, dinh tri, minh tri
tri thuc » tri tue
te sach » toc sach
so sanh » do sanh
thuc da » thuc dan, thuc day, thuc dia

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sach tren thuc cac khoan he thong ) or ( so sanh tri thuc da khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tren thuc cac khoan he thong ) OR ( so sanh tri thuc da khoa phau thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tren thuc cac khoan he thong ) or ( so sanh tri thuc da khoa phau thong ))*.