Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
sach tham » sach nha
tham thuc » nham thuc, pham thuc, tam thuc
thuc dung » thuoc dung, thuy dung, tuc dung
dung khoa » dung cho
khoa kham » kho khan, khoa than
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoa » bach khoa, cac khoa, cac khoan
phu thong » pho thong, phap thong, khau thong
thu sach » tu sach, thuat sach, thuoc sach
sach bai » sach dao, cac bai, sach xa
bai thuc » bai thuoc, bao thuc, dai thuc
khoa phu » khoa phau, khoa thu, hoa phu
so sach » so sanh, bo sach, co sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu sach tham thuc dung khoa kham thong ) or ( so sach bai thuc cach khoa phu thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sach tham thuc dung khoa kham thong ) OR ( so sach bai thuc cach khoa phu thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu sach tham thuc dung khoa kham thong ) or ( so sach bai thuc cach khoa phu thong ))*.