Perhaps you should try some spelling variations:
phan thuong » hang thuong, phan xuong
hoach toan » hach toan
khoan phai » khong phai, khoa phau, khoan hoi
phai phong » hai phong, phap phong, thai phong
thuc thuoc » thuc thuc, truc thuoc, thu thuoc
thuoc cach » thuoc sach, thuc cach, truoc cach
toan thuc » toan hoc, dan thuc, nhan thuc
cach khoa » bach khoa, cac khoa, anh khoa
khoa phan » hoa phan, khoa than, khoa phau
thuc cac » thuc cach, tuc cac, phuc cac
cac thuc » cach thuc, cac thu, can thuc

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 toan thuc cac khoan phai phong ) or ( tu cac thuc thuoc cach khoa phan thuong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach toan thuc cac khoan phai phong ) OR ( tu cac thuc thuoc cach khoa phan thuong )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach toan thuc cac khoan phai phong ) or ( tu cac thuc thuoc cach khoa phan thuong ))*.