Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
thuoc dung » hoc dung, thuy dung
nam thuoc » nam thuc, nam thu, nha thuoc
dung khoa » dung cho
khoa phau » hoa phan, khoa kham, khoa than
canh khoa » anh khoa, xanh khoa, doanh khoa
hoc thong » hoc thuong, hoc trong, hoc hong
sach nam » sach nay, sach tham, sach nang
sach tri » sach tai, sach tren, sach truc
thu canh » thuc hanh, thu cong, thu ban
khoa hoc » hoa hoc
su sach » so sach, vu sach
tri thu » tri thuc, thi thu, tri phu

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach nam thuoc dung khoa phau thong ) or ( su sach tri thu canh khoa hoc thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach nam thuoc dung khoa phau thong ) OR ( su sach tri thu canh khoa hoc thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach nam thuoc dung khoa phau thong ) or ( su sach tri thu canh khoa hoc thong ))*.