Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
khoa phau » hoa phan, khoa kham, khoa than
thuc hach » thuc hanh, chuc hach, thuc cach
hach toan » thanh toan, manh toan
hoc huong » hoc thuong, hoc phuong, hoc luong
sach tri » sach tai, sach tren, sach doi
tri thuc » tri tue
thuc dai » thuc dan, thuc day, thuc tai
dai khoa » da khoa, tai khoa, dac khoa
sach bai » sach dao, cac bai, sach xa
bai thuc » bai thuoc, bao thuc, dai thuc
toan hoc » toan khoa, van hoc, hoa hoc
su sach » so sach, vu sach
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach tri thuc dai khoa phau thong ) or ( te sach bai thuc hach toan hoc huong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tri thuc dai khoa phau thong ) OR ( te sach bai thuc hach toan hoc huong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tri thuc dai khoa phau thong ) or ( te sach bai thuc hach toan hoc huong ))*.