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 cach » thuoc sach, truoc cach, thuc hanh
thuoc anh » thuoc thanh, thuoc dang, thuoc sach
khoa kham » kho khan, khoa than
cach hoa » cach hoan, cach hoc, bach hoa
dan tong » dan trong, han tong, dan dong
xa thuoc » va thuoc, na thuoc, xa thuc
anh khoa » doanh khoa, hang khoa
tu sach » thu sach, su sach, te sach
sach xa » sach dao, sach nha, sach bai

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 tham thuc cach hoa dan tong ) or ( tu sach xa thuoc anh khoa kham thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tham thuc cach hoa dan tong ) OR ( tu sach xa thuoc anh khoa kham thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tham thuc cach hoa dan tong ) or ( tu sach xa thuoc anh khoa kham thong ))*.