Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
cach khuan » cac khoan, cach hoan
sach tren » sach tien, sach tranh
tren thuc » trien thuc, tron thuc, trinh thuc
hanh khoa » hang khoa, anh khoa, hanh hoa
khoa phau » hoa phan, khoa kham, khoa than
thuc cach » thuoc sach, truoc cach, tuc cac
khuan hoa » khuan khoa, chuan hoa, nhuan khoa
hoa thong » hoa trong, hoa khong, hoa thon
sinh tai » sinh thai, hinh tai, sinh dai
tai thuc » thai thuc, tri thuc, dai thuc
su sach » so sach, vu 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 tren thuc hanh khoa phau thong ) or ( hoc sinh tai thuc cach khuan hoa thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tren thuc hanh khoa phau thong ) OR ( hoc sinh tai thuc cach khuan hoa thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tren thuc hanh khoa phau thong ) or ( hoc sinh tai thuc cach khuan hoa thong ))*.