Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
truc thuoc » thuc thuc, tri thuoc, tu thuoc
khoan phan » khoan phai, khoan thanh, hoa phan
phan thong » phan thuong, phan hong, phan tong
sach truc » cach thuc, sach tren, sach thu
thuoc ban » thuoc tan, thuoc dang, thu ban
khoa kham » kho khan, khoa than
tri truoc » tri thuoc, tri thuc, gi truoc
truoc cac » truoc cach, truoc cang, truoc cuoc
ban khoa » san khoa, van khoa, ba khoa
sach tri » sach tai, sach tren, sach bai
tu sach » thu sach, su sach, te sach

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 truc thuoc ban khoa kham thong ) or ( tu sach tri truoc cac khoan phan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach truc thuoc ban khoa kham thong ) OR ( tu sach tri truoc cac khoan phan thong ))*.