Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
van thanh » ban thanh, van tuan
toan cuc » toan cua, toan buc, toan duc
nam duoc » nam thuoc, da duoc, dat duoc
tu sach » thu sach, su sach, te sach
dao duc » giao duc, tao duoc
vang xa » lang xa, mang xa, dang xay
hieu ve » hieu va, hieu van
sach ly » sach y, sach lo, sach ty
ang xa » lang xa, mang xa, dang xay
cuc te » cua te, cuc thue, cuc tieu

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 ly ((vang xa) or (ang xa)) hoi. hieu ve ((nam duoc) or (dao duc)) van thanh toan cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly ((vang xa) OR (ang xa)) hoi. hieu ve ((nam duoc) OR (dao duc)) van thanh toan cuc te.
• Adding a wildcard symbol may retrieve word variants: tu sach ly ((vang xa) or (ang xa)) hoi. hieu ve ((nam duoc) or (dao duc)) van thanh toan cuc te*.