Perhaps you should try some spelling variations:
khoan phap » khoan phai, khoa phau, han phap
luan thong » luan phong, luan tuong, luat thong
phap thong » phap phong, phap chong, pho thong
cach thuc » anh thuc, cac thu
sach tien » sach tren, sach thieu
tien tich » dien tich, lien tich, tien tinh
cao khoan » cac khoan, tao khoang, lao khoa
cao khoa » lao khoa, bao khoa, cac khoa
tich cao » tich bao, tich cac, tinh cao
tu cach » tu cac
thuc cu » thuc cua, thuc co, truc cu
te sach » toc sach

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 thuc cu cao khoa luan thong ) or ( te sach tien tich cao khoan phap thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach thuc cu cao khoa luan thong ) OR ( te sach tien tich cao khoan phap thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach thuc cu cao khoa luan thong ) or ( te sach tien tich cao khoan phap thong ))*.