Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
tham nang » nham nang, tham nhung, thuat nang
tham lang » nham nang, pham hang, thai bang
hanh le » thanh le, hanh ve, hanh de
va hanh » van hanh, va thanh, va danh
van cau » van dau, van hau, van chat
le cua » ly cua
va cau » va cac, va dau, va cao
luc va » duc va, tuc va, loc va
cua te » cua tu

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: thuoc sach ((tham nang) OR (tham lang)) xa hoi. hieu ((va cau) OR (van cau)) luc va hanh le cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((tham nang) OR (tham lang)) xa hoi. hieu ((va cau) or (van cau)) luc va hanh le cua te~".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((tham nang) OR (tham lang)) xa hoi. hieu ((va cau) or (van cau)) luc va hanh le cua te*.