Perhaps you should try some spelling variations:
thuc doanh » thuc hanh, thuc dan, chuc danh
doanh khoa » toan khoa
than thong » than thuong, toan thong, tran thong
phan thong » phan thuong, phan hong, phan tong
khoa than » khoa luan, hoa thai, hoa tan
hoac tham » hoach thay, hoa thai, hoc thai
tham thuc » nham thuc, pham thuc, tam thuc
thuc cach » thuoc sach, truoc cach, thuc hanh
cach toan » hach toan, cach hoan, hoach toan
toan phan » thanh phan, toan ban, hoa phan
sach bai » sach dao, cac bai, sach xa
bai thuc » bai thuoc, bao thuc, dai thuc
tu sach » thu sach, su sach, te sach
tu hoac » tu hoc, tu hoa, tu hoai

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 bai thuc doanh khoa than thong ) or ( tu hoac tham thuc cach toan phan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach bai thuc doanh khoa than thong ) OR ( tu hoac tham thuc cach toan phan thong ))*.