Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thanh hai » thanh phan, thanh hoa, thanh san
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
ve triet » va trien, su triet
van bac » van ban, van bao, van hac
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: thu sach y nang x hoi. hieu van bac duc va ((thanh van) or (thanh hai)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. hieu van bac duc va ((thanh van) OR (thanh hai)) ve triet.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. hieu van bac duc va ((thanh van) or (thanh hai)) ve triet*.