Perhaps you should try some spelling variations:
sinh khoanh » sinh khoa, dinh khanh, sinh khong
khoanh pham » khanh pham, thanh pham, khoan phai
pham thuong » phan thuong, pham hong
thuoc sinh » hoc sinh, thu sinh, thuoc sach
thuc doanh » thuc hanh, thuc dan, chuc danh
doanh khoa » toan khoa
phau thong » phap thong, khau thong, phan thong
tham thuc » nham thuc, pham thuc, tam thuc
khoa phau » hoa phan, khoa kham, khoa than
tu thuoc » truc thuoc, tu thuong, cua thuoc
cac tham » cac ham, sach tham, cac thanh
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty

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 tu thuoc sinh khoanh pham thuong ) or ( tu cac tham thuc doanh khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tu thuoc sinh khoanh pham thuong ) OR ( tu cac tham thuc doanh khoa phau thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tu thuoc sinh khoanh pham thuong ) or ( tu cac tham thuc doanh khoa phau thong ))*.