Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
khoa kham » kho khan, khoa than
thuc bach » truc bach, thuc cach, thuoc sach
bach khoe » bach khoa, bach hue, bach hoa
phu thong » pho thong, phap thong, khau thong
cach dao » sach dao, cach bao, cach nao
dao thuc » dan thuc, dao tuc, do thuc
thuc dan » thuc hanh, hoc dan, thuc vat
dan khoa » dang khoa, da khoa, san khoa
sach dai » sach dao, sach bai, sach dat
dai thuc » dan thuc, dai thu, dai thua
khoe phu » khoa phu, khoa phau, cho phu
tu cach » tu cac
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 cach dao thuc dan khoa kham thong ) or ( su sach dai thuc bach khoe phu thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach dao thuc dan khoa kham thong ) OR ( su sach dai thuc bach khoe phu thong ))*.