Perhaps you should try some spelling variations:
phan thuong » hang thuong, phan xuong
khan thong » khap thong, khau thong, nhan thong
cach thuc » anh thuc, cac thu
hach toan » thanh toan, manh toan
toan phan » thanh phan, toan ban, hoa phan
bach kho » bach khoa, bac ho, benh kho
kho khan » khoa kham, khoa than
te cach » ve cach, te sach, tu cach
thuc tu » thuoc tu, thuc te, thu tu
tu hach » tu hanh, tu cach, tu sach
tu bach » vu bach, tu cach, tu bac

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( te cach thuc tu hach toan phan thuong ) OR ( te cach thuc tu bach kho khan thong ))~.
• Adding a wildcard symbol may retrieve word variants: (( te cach thuc tu hach toan phan thuong ) or ( te cach thuc tu bach kho khan thong ))*.