Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, pham duc
hieu van » hieu va, thien van, lieu va
sach ky » sach y, sach ty, sach kem
hanh va » hang va, hanh vi
sac ky » cac ky, sai ky
va cau » van cau, va cac, va dau
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: tu ((sach ky) OR (sac ky)) nang x hoi. hieu van ((cham xuc) OR (cham soc)) van hanh va cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) nang x hoi. hieu van ((cham xuc) or (cham soc)) van hanh va cau tren~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) nang x hoi. hieu van ((cham xuc) or (cham soc)) van hanh va cau tren*.