Perhaps you should try some spelling variations:
than xuong » phan xuong, than uong, thanh huong
thuoc sach » hoc sach, nuoc sach, thuat sach
doanh khoa » toan khoa
phau thong » phap thong, khau thong, phan thong
tai thuoc » tri thuoc, bai thuoc, tac thuoc
sach khoa » bach khoa, sach nha, anh khoa
khoa than » khoa luan, hoa thai, hoa tan
thu doanh » thu oanh, tri doanh, thu hoach
khoa phau » hoa phan, khoa kham, khoa thu
sach tai » sach bai, sach tham, sach dao
sach dai » sach dao, sach bai, sach dat
tu sach » thu sach, su sach, tu cach
te sach » toc sach
dai thu » dai thua, dai thuc, doi thu

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 tai thuoc sach khoa than xuong ) or ( te sach dai thu doanh khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tai thuoc sach khoa than xuong ) OR ( te sach dai thu doanh khoa phau thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tai thuoc sach khoa than xuong ) or ( te sach dai thu doanh khoa phau thong ))*.