Perhaps you should try some spelling variations:
khoanh khac » khoa khac
tren thuoc » trien thuoc, tren thuc, trung thuoc
anh khoanh » anh khoa, anh hoang, anh thanh
khac trong » khac thuong, hoc trong, tac trong
sach tren » sach tien, sach tranh
phan tong » phan trong, phan cong, han tong
thuoc anh » thuoc thanh, thuoc dang, thuoc sach
sanh tri » thanh tri, dinh tri, minh tri
hoc dung » hoc ung, hoc dan, tac dung
dung hoa » dung khoa, duong hoa, dung hoai
hoa phan » hoa dan, co phan
so sanh » do sanh
tri hoc » triet hoc, tri thuc, thai hoc
tu sach » thu sach, su sach, te 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 tri hoc dung hoa phan tong ) or ( tu sach tren thuoc anh khoanh khac trong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh tri hoc dung hoa phan tong ) OR ( tu sach tren thuoc anh khoanh khac trong ))*.