Perhaps you should try some spelling variations:
trong thuat » trong hoat, trong thu, trong phat
tham thuoc » pham thuoc, tham thuc, nha thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
sach khuan » sach khuyen, sach han, sach luan
khoa thong » hoa thong, thoai thong, khoi khong
sanh trong » sinh trong, anh trong, hanh trong
thuat canh » thuat lanh, thuat cong, thuat san
sach tham » sach nha
canh khoa » anh khoa, xanh khoa, doanh khoa
pho thong » he thong
khoa pho » khoa phu, khoa khoa, khoa phau
tu sach » thu sach, su sach, te sach
tu sanh » tu hanh, tu manh, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach tham thuoc sach khuan khoa thong ) or ( tu sanh trong thuat canh khoa pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tham thuoc sach khuan khoa thong ) OR ( tu sanh trong thuat canh khoa pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tham thuoc sach khuan khoa thong ) or ( tu sanh trong thuat canh khoa pho thong ))*.