Perhaps you should try some spelling variations:
khoan phap » khoan phai, khoa phau, han phap
phu thong » pho thong, phap thong, khau thong
xac khoan » cac khoan, coc khoan, dac khoa
phap phan » phap phat, phap hoan, phap luan
sach tri » sach tai, sach tren, sach truc
tri thac » tri thuc, tri tac, tri tham
thac cac » thoai cac, thanh cac, thuc cach
cac khoa » cac khoan, cac khoi, dac khoa
khoa phu » khoa phau, khoa thu, hoa phu
sach dai » sach dao, sach bai, sach dat
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
dai thu » dai thua, dai thuc, doi thu
thu xac » thau xay

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach tri thac cac khoa phu thong ) or ( su sach dai thu xac khoan phap phan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tri thac cac khoa phu thong ) OR ( su sach dai thu xac khoan phap phan )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tri thac cac khoa phu thong ) or ( su sach dai thu xac khoan phap phan ))*.