Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
khoa kham » kho khan, khoa than
sach tren » sach tien, sach tranh
tren thuc » trien thuc, tron thuc, trinh thuc
pho thong » he thong
sach tam » sach tham, sach tai, sach dao
tam thuc » tham thuc, am thuc, nam thuc
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
khoa pho » khoa phu, khoa khoa, khoa phau
tu sach » thu sach, su sach, te sach
thuc da » thuc dan, thuc day, thuc dia

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 tam thuc anh khoa kham thong ) or ( tu sach tren thuc da khoa pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tam thuc anh khoa kham thong ) OR ( tu sach tren thuc da khoa pho thong ))*.