Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
thuoc cach » thuoc sach, thuc cach, truoc cach
hanh khoa » hang khoa, anh khoa, hanh hoa
pho thong » he thong
cao thuoc » cay thuoc, cua thuoc, nam thuoc
cach khoa » bach khoa, cac khoa, cac khoan
khoa phau » hoa phan, khoa kham, khoa than
cach tai » cac tai, cach ta, sach tai
tai thuc » thai thuc, tri thuc, dai thuc
khoa pho » khoa phu, khoa khoa, khoa hoc
lanh cao » lanh dao, lang cao, lanh co
tu cach » tu cac
te lanh » te danh, te lan, tu lanh

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 tai thuc hanh khoa pho thong ) or ( te lanh cao thuoc cach khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach tai thuc hanh khoa pho thong ) OR ( te lanh cao thuoc cach khoa phau thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach tai thuc hanh khoa pho thong ) or ( te lanh cao thuoc cach khoa phau thong ))*.