Perhaps you should try some spelling variations:
khau thong » khau thuong, khap thong, khau tong
phau thong » phap thong, phan thong, phan thuong
khoa phau » hoa phan, khoa kham, khoa than
khoa khau » khoa kham, khoa chau, khoa khac
sanh toi » hanh thoi, van toi, anh thi
cac khoa » cac khoan, cac khoi, dac khoa
sach tri » sach tai, sach tren, sach bai
cam khoa » nam khoa, cam hoa, cao khoa
so sanh » do sanh
tu sach » thu sach, su sach, te sach
tri phu » thi phu, tri thuc, tri phan
phu cam » phuc cam, pho cam, phu can
toi tu » troi tu, loi tu, toi uu

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sanh toi tu cac khoa phau thong ) or ( tu sach tri phu cam khoa khau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh toi tu cac khoa phau thong ) OR ( tu sach tri phu cam khoa khau thong ))*.