Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
thuoc sach » hoc sach, nuoc sach, thuat sach
thuat xanh » thuat lanh, thuat canh, thuat nganh
than thong » than thuong, toan thong, tran thong
dao thuoc » cao thuoc, tao thuoc, dang thuoc
sach khoa » bach khoa, sach nha, anh khoa
khoa phau » hoa phan, khoa kham, khoa thu
xanh khoa » anh khoa, doanh khoa, nganh khoa
khoa than » khoa luan, hoa thai, hoa tan
toc sach » hoc sach, doc sach, nuoc sach
sach dao » lanh dao
ki thuat » ky thuat
tu sach » thu sach, su sach, te sach
sach ki » sach kinh, sach bai, sach kem

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( toc sach dao thuoc sach khoa phau thong ) or ( tu sach ki thuat xanh khoa than thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( toc sach dao thuoc sach khoa phau thong ) OR ( tu sach ki thuat xanh khoa than thong )).
• Adding a wildcard symbol may retrieve word variants: (( toc sach dao thuoc sach khoa phau thong ) or ( tu sach ki thuat xanh khoa than thong ))*.