Perhaps you should try some spelling variations:
thuc doanh » thuc hanh, thuc dan, chuc danh
doanh khoa » toan khoa
kham thong » khap thong, khau thong, pham thuong
sach tranh » canh tranh
tranh thuc » trinh thuc, trang thuc, thanh thuy
khoa kham » kho khan, khoa than
thuc cach » thuoc sach, truoc cach, thuc hanh
phan tong » phan trong, phan cong, han tong
sach dan » sach danh, sach dao, sach dat
dan thuc » dan toc, am thuc
thu sach » thuat sach, thuoc sach, thu hoach
cach hoa » cach hoan, cach hoc, bach hoa
hoa phan » hoa dan, co phan
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 doanh khoa kham thong ) or ( thu sach tranh thuc cach hoa phan tong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach dan thuc doanh khoa kham thong ) OR ( thu sach tranh thuc cach hoa phan tong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach dan thuc doanh khoa kham thong ) or ( thu sach tranh thuc cach hoa phan tong ))*.