Perhaps you should try some spelling variations:
phan thuong » hang thuong, phan xuong
tri thuoc » tri thuc, tri hoc, tin thuoc
thuoc ban » thuoc tan, thuoc dang, thu ban
dao thuoc » cao thuoc, tao thuoc, dang thuoc
sach tri » sach tai, sach tren, sach truc
hoa phan » hoa dan, co phan
thu sach » tu sach, thuat sach, thuoc sach
sach dao » lanh dao
ban khoa » san khoa, van khoa, ba khoa
so sach » so sanh, bo sach, co sach
ban hoa » van hoa, ba hoa, bao hoa
khoa he » hoa he, khoa hoc, khong he
thong » trong

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sach tri thuoc ban hoa phan thuong ) or ( thu sach dao thuoc ban khoa he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sach tri thuoc ban hoa phan thuong ) OR ( thu sach dao thuoc ban khoa he thong ))*.