Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
khap thong » phap thong, khau thong, khac thuong
thuc cach » thuoc sach, truoc cach, thuc hanh
dao tuyet » dao tuyen, tao tuyet, dao truyen
tuyet dac » tuyet day, thuyet dan, thuyet cac
khoa phau » hoa phan, khoa kham, khoa than
sach dai » sach bai, sach dat, sach dau
dai thuc » dan thuc, dai thu, dai thua
cach toc » cac toc, cach hoc, cach thuc
toc khap » toc thai, toc cham, hoc phap
sach dao » lanh dao
dac khoa » da khoa, dai khoa, dau khoa
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: (( su sach dai thuc cach toc khap thong ) or ( su sach dao tuyet dac khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach dai thuc cach toc khap thong ) OR ( su sach dao tuyet dac khoa phau thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach dai thuc cach toc khap thong ) or ( su sach dao tuyet dac khoa phau thong ))*.