Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thuong
phan thong » phan thuong, phan hong, phan tong
bach khoa » anh khoa
khoa phau » hoa phan, khoa kham, khoa than
cach thuc » anh thuc, cac thu
thuc thuc » hoc thuc
thuc hang » thuc hanh, thu hang, phuc hang
hang khoa » dung khoa
khoa phan » hoa phan, khoa than, khoan phai
tu cach » tu cac
tu truc » cau truc, tu thuoc, tu trung

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 tu truc bach khoa phau thong ) or ( tu cach thuc thuc hang khoa phan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach tu truc bach khoa phau thong ) OR ( tu cach thuc thuc hang khoa phan thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach tu truc bach khoa phau thong ) or ( tu cach thuc thuc hang khoa phan thong ))*.