Perhaps you should try some spelling variations:
khoan phap » khoan phai, khoa phau, han phap
cach tham » sach tham, cach thuc, cach pha
tham thuc » nham thuc, pham thuc, tam thuc
pho thong » he thong
sach tri » sach tai, sach tren, sach truc
tri phuc » tri thuc, tri phu, thi phuc
ca khoan » cac khoan, coc khoan, tai khoan
thuc cac » thuc cach, tuc cac, phuc cac
cac khoa » cac khoan, cac khoi, dac khoa
khoa pho » khoa phu, khoa khoa, khoa phau
te sach » toc sach
phuc ca » phuc cam, phuc cua, phuc cac
tu cach » tu cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sach tri phuc ca khoan phap tieng ) or ( tu cach tham thuc cac khoa pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tri phuc ca khoan phap tieng ) OR ( tu cach tham thuc cac khoa pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tri phuc ca khoan phap tieng ) or ( tu cach tham thuc cac khoa pho thong ))*.