Perhaps you should try some spelling variations:
khau thong » khau thuong, khap thong, khau tong
kham thong » khap thong, pham thuong, khac thuong
thuc bach » truc bach, thuc cach, thuoc sach
bach xuat » bach xuan, xac xuat, bach qua
xuat khau » xuat nhap
khoa kham » kho khan, khoa than
sach dan » sach danh, sach dao, sach dat
dan thuc » dan toc, am thuc
thu sach » thuat sach, thuoc sach, thu hoach
sach bai » sach dao, cac bai, sach xa
bai thuc » bai thuoc, bao thuc, dai thuc
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
tu sach » su sach, te sach, tu cach

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 dan thuc bach xuat khau thong ) or ( thu sach bai thuc anh khoa kham thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach dan thuc bach xuat khau thong ) OR ( thu sach bai thuc anh khoa kham thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach dan thuc bach xuat khau thong ) or ( thu sach bai thuc anh khoa kham thong ))*.