Perhaps you should try some spelling variations:
thanh xuan » thanh san, thanh toan, thanh phan
thanh sua » hanh sua, thanh qua, thanh tuan
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
van cau » van dau, van hau, van chat
van cam » van nam, van lam, van dam
loc va » hoc va, luc va
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang x hoi. hieu ((van cam) or (van cau)) loc va ((thanh sua) OR (thanh xuan)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu ((van cam) OR (van cau)) loc va ((thanh sua) OR (thanh xuan)) va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. hieu ((van cam) or (van cau)) loc va ((thanh sua) OR (thanh xuan)) va triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu ((van cam) or (van cau)) loc va ((thanh sua) OR (thanh xuan)) va triet*.