Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
tham xuc » tham nuoc, tham thuc, pham duc
tai cac » tai cuc
vai cac » va cac, voi cac, vay cac
vai cau » va cau, van cau, lai chau
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
sach ty » sach y, sach tu, sach thu
va danh » va dinh, va dan, va hanh
xuc va » duc va, tuc va, luc va
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 ty nang x hoi. hieu van tham xuc va danh ((vai cau) OR (((vai cac) OR (tai cac)))) tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. hieu van tham xuc va danh ((vai cau) or (((vai cac) OR (tai cac)))) tren~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu van tham xuc va danh ((vai cau) or (((vai cac) OR (tai cac)))) tren*.