Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
hanh khoa » hang khoa, anh khoa, hanh hoa
khoa khoi » khoa hoi, khoa khoa, thoat khoi
khoa phau » hoa phan, khoa kham, khoa than
sinh tri » dinh tri, minh tri, tinh tri
tri thuc » tri tue
sinh tai » sinh thai, hinh tai, sinh dai
tai thuc » thai thuc, dai thuc, thi thuc
khong » phong

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( hoc sinh tri thuc hanh khoa khoi khong ) or ( hoc sinh tai thuc hanh khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( hoc sinh tri thuc hanh khoa khoi khong ) OR ( hoc sinh tai thuc hanh khoa phau thong )).
• Adding a wildcard symbol may retrieve word variants: (( hoc sinh tri thuc hanh khoa khoi khong ) or ( hoc sinh tai thuc hanh khoa phau thong ))*.