Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hieu van » hieu va, thien van, lieu va
thanh va » thanh van, hanh va, thanh ha
cau tren » cu tren, dau tren, cau treo
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ca tren » cu tren, la tren, co tren
x hoi » xa hoi, o hoi, x ho

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 nang x hoi. hieu van ((cam xuc) OR (cham soc)) van thanh va ((cau tren) OR (ca tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu van ((cam xuc) or (cham soc)) van thanh va ((cau tren) OR (ca tren))~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu van ((cam xuc) or (cham soc)) van thanh va ((cau tren) OR (ca tren))*.