Perhaps you should try some spelling variations:
tien truoc » trien thuoc, kien truc, tien trung
truoc bang » thuoc bang, truoc cang, truoc cong
trong thuc » trong thu, thuong thuc, trong thuat
phan thong » phan thuong, phan hong, phan tong
sach tien » sach tren, sach thieu
bang khoa » hang khoa, dang khoa, vang khoa
phu thong » pho thong, phap thong, khau thong
hoc trong » hoc thuong, hoc tieng, dot trong
khoa phu » khoa phau, khoa thu, hoa phu
hanh hoa » thanh hoa, khanh hoa, hang hoa
hoa phan » hoa dan, co phan
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: (( te sach tien truoc bang khoa phu thong ) or ( te hoc trong thuc hanh hoa phan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tien truoc bang khoa phu thong ) OR ( te hoc trong thuc hanh hoa phan thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tien truoc bang khoa phu thong ) or ( te hoc trong thuc hanh hoa phan thong ))*.