Perhaps you should try some spelling variations:
khap thong » phap thong, khau thong, khac thuong
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoa » bach khoa, cac khoa, cac khoan
khoa khap » khoa kham, khoa khac, kho khan
phan tong » phan trong, phan cong, han tong
sach tri » sach tai, sach tren, sach truc
tri thuc » tri tue
sach dao » lanh dao
dao thuc » dan thuc, dao tuc, do thuc
thuc cao » thuoc cao, thuc co, thuc can
hoa phan » hoa dan, co phan
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
cao hoa » cao hoat, cao khoa, cau hoa

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 thuc cach khoa khap thong ) or ( su sach dao thuc cao hoa phan tong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tri thuc cach khoa khap thong ) OR ( su sach dao thuc cao hoa phan tong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tri thuc cach khoa khap thong ) or ( su sach dao thuc cao hoa phan tong ))*.