Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
khoan phai » khong phai, khoa phau, khoan hoi
phai tuong » phan thuong, pham thuong, pham truong
khoa kham » kho khan, khoa than
coc khoan » cac khoan, hoc khoa, con khoa
sach tri » sach tai, sach tren, sach truc
tri thuc » tri tue
thuc cac » thuc cach, tuc cac, phuc cac
cac khoa » cac khoan, cac khoi, dac khoa
tri thac » tri tac, tri tham, tri thuoc
thac coc » thac cac, thac toc, khac cuoc
te sach » toc sach
vu sach » vu bach, su sach, vu khach

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 thuc cac khoa kham thong ) or ( vu sach tri thac coc khoan phai tuong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tri thuc cac khoa kham thong ) OR ( vu sach tri thac coc khoan phai tuong ))*.