Perhaps you should try some spelling variations:
thuat doanh » thuat toan, luat doanh, thuat lanh
doanh khoa » toan khoa
khau thong » khau thuong, khap thong, khau tong
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoa » bach khoa, cac khoa, cac khoan
phi thong » phi thuong, pho thong, phi trong
khoa khau » khoa kham, khoa phau, khoa chau
sach bao » sach dao, sach bai, sach bac
bao thuc » cao thuoc, am thuc, va thuc
khoa phi » hoa phi, khoa phu, khoan phai
hoach va » hoach xay, hanh va, doanh va
va thuat » ky thuat, ki thuat, va thuc
tu sach » thu sach, su sach, te 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 sach bao thuc cach khoa phi thong ) or ( thu hoach va thuat doanh khoa khau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach bao thuc cach khoa phi thong ) OR ( thu hoach va thuat doanh khoa khau thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach bao thuc cach khoa phi thong ) or ( thu hoach va thuat doanh khoa khau thong ))*.