Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
phau thong » phap thong, khau thong, phan thong
hang khoa » dung khoa
khoa phau » hoa phan, khoa than, khoa thu
khoa kham » kho khan, khoa than
sach tri » sach tai, sach tren, sach truc
tue hang » te hang, lue zhang, thuy hang
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
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu 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 tri tue hang khoa phau thong ) or ( su sach tam thuc anh khoa kham thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tri tue hang khoa phau thong ) OR ( su sach tam thuc anh khoa kham thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tri tue hang khoa phau thong ) or ( su sach tam thuc anh khoa kham thong ))*.