Perhaps you should try some spelling variations:
khoa thong » hoa thong, thoai thong, pho thong
dac khuan » cac khoan, duc thuan, dac nhan
sach tham » sach nha
tham thuc » nham thuc, pham thuc, tam thuc
hoc thong » hoc thuong, hoc trong, hoc hong
thuc dac » thuoc dac, thuc dan, thuc day
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
khoa hoc » hoa hoc
tu cach » tu cac
cach xa » sach xa, cac xa, cach ta
xa thuc » va thuc, xa phuc, a thuc
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: (( tu cach xa thuc dac khuan khoa thong ) or ( te sach tham thuc anh khoa hoc thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach xa thuc dac khuan khoa thong ) OR ( te sach tham thuc anh khoa hoc thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach xa thuc dac khuan khoa thong ) or ( te sach tham thuc anh khoa hoc thong ))*.