Perhaps you should try some spelling variations:
hoach dang » hoach bang, hoach mang, hoach quang
dang thuoc » dung thuoc
hanh khoa » hang khoa, anh khoa, hanh hoa
phu thong » pho thong, phap thong, khau thong
thuoc tan » thuoc tai, thuoc ban, thuoc tren
sach tri » sach tai, sach tren, sach truc
tue hanh » tu hanh, tuc hanh, tue anh
khoa phu » khoa phau, khoa thu, hoa phu
tan khoa » toan khoa, tran khoa, san khoa
te sach » toc sach

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: (( te sach tri tue hanh khoa phu thong ) OR ( thu hoach dang thuoc tan khoa phu thong ))~.
• Adding a wildcard symbol may retrieve word variants: (( te sach tri tue hanh khoa phu thong ) or ( thu hoach dang thuoc tan khoa phu thong ))*.