Perhaps you should try some spelling variations:
bach khuan » bach khoa, bach khang, bach xuan
phan thong » phan thuong, phan hong, phan tong
khoa thong » hoa thong, thoai thong, pho thong
thuat san » thuat toan, thuat song, thuat lanh
sach tren » sach tien, sach tranh
tren thuc » trien thuc, tron thuc, trinh thuc
thuc bach » truc bach, thuc cach, thuoc sach
ki thuat » ky thuat
hoa phan » hoa dan, co phan
tu sach » thu sach, su sach, te sach
sach ki » sach kinh, sach bai, sach kem
san hoa » san khoa, van hoa, son hoa

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 ki thuat san hoa phan thong ) or ( tu sach tren thuc bach khuan khoa thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach ki thuat san hoa phan thong ) OR ( tu sach tren thuc bach khuan khoa thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach ki thuat san hoa phan thong ) or ( tu sach tren thuc bach khuan khoa thong ))*.