Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh tai » thanh hai, thanh toan, doanh tai
hieu van » thien van, lieu va, hieu ve
su sach » so sach, vu sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
tai cua » thai cua, tai cuc, tri cua
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
ha tuc » ha thuc, va tuc, thai tuc
ha duc » ho duc, ha dac, xa duc
cua te » cua tu

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: su sach ky lang xa hoi. ((hieu van) OR (hieu va)) ((ha tuc) OR (ha duc)) van thanh tai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang xa hoi. ((hieu van) OR (hieu va)) ((ha tuc) or (ha duc)) van thanh tai cua te~".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. ((hieu van) OR (hieu va)) ((ha tuc) or (ha duc)) van thanh tai cua te*.