Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
sanh tham » sach tham, san pham, sinh thai
tham thuy » thai thuy, pham thuy, thac thuy
khoa phau » hoa phan, khoa kham, khoa than
sach nham » sach nha, sach tham, sach han
nham thuc » nhan thuc, nam thuc, nham thu
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoa » bach khoa, cac khoa, cac khoan
khoa phap » khoan phai, khong phap, hoa phan
thuy anh » thuy linh
anh khoa » doanh khoa, hang khoa
so sanh » do sanh
so sach » bo sach, co sach, hoc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sanh tham thuy anh khoa phau thong ) or ( so sach nham thuc cach khoa phap tieng ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh tham thuy anh khoa phau thong ) OR ( so sach nham thuc cach khoa phap tieng )).
• Adding a wildcard symbol may retrieve word variants: (( so sanh tham thuy anh khoa phau thong ) or ( so sach nham thuc cach khoa phap tieng ))*.