Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
khoa kham » kho khan, khoa than
bach thai » sach tham, bach mai, lich thai
thai thuc » thai thuy, thai tuc, tham thuc
dan thong » dan trong, ban thong, dan phong
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
cac hoat » cao hoat, cac khoan, cac thuat
hoat dan » hoa dan, hat dan, hoat van
tu sach » thu sach, su sach, te 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 sach tri thuc cac khoa kham thong ) or ( vu bach thai thuc cac hoat dan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tri thuc cac khoa kham thong ) OR ( vu bach thai thuc cac hoat dan thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tri thuc cac khoa kham thong ) or ( vu bach thai thuc cac hoat dan thong ))*.