Perhaps you should try some spelling variations:
cach khoan » cac khoan, cach hoan, coc khoan
khoan phap » khoan phai, han phap, khong phap
phap chong » phap phong, phap cong, pham hong
phau thong » phap thong, khau thong, phan thong
thanh dai » thanh hai, thanh tai, thanh dat
thuc cach » thuoc sach, truoc cach, thuc hanh
thai truc » thai thuc, thai tuc, thi truc
bach khoa » anh khoa
khoa phau » hoa phan, khoa kham, khoa than
tu thanh » thu thanh, su thanh, ta thanh
dai thuc » dan thuc, dai thu, dai thua
sac thai » rac thai, sach tham, toc thai
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu thanh dai thuc cach khoan phap chong ) or ( tu sac thai truc bach khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu thanh dai thuc cach khoan phap chong ) OR ( tu sac thai truc bach khoa phau thong ))*.