Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
thuoc sach » hoc sach, nuoc sach, thuat sach
bai thuoc » ban thuoc, bai hoc, cay thuoc
sach khoa » bach khoa, sach nha, anh khoa
khoa phau » hoa phan, khoa kham, khoa than
canh khoa » anh khoa, xanh khoa, doanh khoa
rac thai » sac thai, toc thai, bac thay
thai thu » thai thuy, thai thuc, thi thu
thu canh » thuc hanh, thu cong, thu ban
thu hoc » tu hoc, thu hoi, tru hoc
hoc bai » hoc dai, hoc giai
thu rac » thu xac, thu dac, thu sach
khoa he » hoa he, khoa hoc, khong he

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

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