Perhaps you should try some spelling variations:
tren thuoc » trien thuoc, tren thuc, trung thuoc
than thong » than thuong, toan thong, tran thong
thuoc toan » thuoc tan, thuoc thanh, thuat toan
kham thong » khap thong, khau thong, pham thuong
thuc dung » thuoc dung, thuy dung, tuc dung
dung khoa » dung cho
khoa than » khoa luan, hoa thai, hoa tan
sach tren » sach tien, sach tranh
khoa kham » kho khan
so chinh » soc chinh, do chinh, su chinh
tri thuc » tri tue
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: (( so chinh tri thuc dung khoa than thong ) or ( te sach tren thuoc toan khoa kham thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so chinh tri thuc dung khoa than thong ) OR ( te sach tren thuoc toan khoa kham thong )).
• Adding a wildcard symbol may retrieve word variants: (( so chinh tri thuc dung khoa than thong ) or ( te sach tren thuoc toan khoa kham thong ))*.