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