Perhaps you should try some spelling variations:
ban thanh » ban hang
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat xuc » chat huu, cam xuc, chao xu
ban hanh » ban hang
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
luu tre » luu tru, cuu tre, luy tre
vi luu » vi lua

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 sach ty nang x ho. hieu van chat xuc ((ban hanh) OR (ban thanh)) vi luu tre~.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang x ho. hieu van chat xuc ((ban hanh) or (ban thanh)) vi luu tre*.