Perhaps you should try some spelling variations:
thuc doanh » thuc hanh, thuc dan, chuc danh
doanh khoa » toan khoa
cach khoan » cac khoan, cach hoan, bach khoa
khoan phai » khong phai, khoa phau, khoan hoi
phai thong » phap thong, phai tuong, phan thong
hoach tai » hoach toi, hoach toan, hoach thay
thua cach » thuc cach, thuat sach, thuat canh
tai thuc » thai thuc, tri thuc, dai thuc
sach dai » sach dao, sach bai, sach dat
dai thua » dai thu, dai thuc, dai cua
khoa he » hoa he, khoa hoc, khong he
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: (( thu hoach tai thuc doanh khoa he thong ) or ( tu sach dai thua cach khoan phai thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach tai thuc doanh khoa he thong ) OR ( tu sach dai thua cach khoan phai thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach tai thuc doanh khoa he thong ) or ( tu sach dai thua cach khoan phai thong ))*.