Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
sach tien » sach tren, sach thieu
tien thuc » trien thuc, kien thuc, bien thuc
cao khoan » cac khoan, tao khoang, lao khoa
khoan pho » khoan nhoi, khoan phai, khoan hoi
pho thong » he thong
khoa phau » hoa phan, khoa kham, khoa than
thuc cao » thuoc cao, thuc co, thuc can
sach thu » sach thue, sach thieu, sach tham
thu thuc » thuc thuc, thu thuoc, thue thuc
cao khoa » lao khoa, bao khoa, cac khoa
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 tien thuc cao khoan pho thong ) or ( tu sach thu thuc cao khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tien thuc cao khoan pho thong ) OR ( tu sach thu thuc cao khoa phau thong ))*.