Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thanh hai » thanh phan, thanh hoa, thanh san
hieu van » hieu va, thien van, lieu va
va triet » va thiet, va trien, ve triet
van bac » van ban, van bao, van hac
bac tuc » bac tu, bach tuoc, bac thua
tuc ban » thuc ban, truc ban, tu ban
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky nang ((o hoi) or (x ho)). hieu van bac tuc ban ((thanh van) or (thanh hai)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((o hoi) OR (x ho)). hieu van bac tuc ban ((thanh van) OR (thanh hai)) va triet.
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((o hoi) or (x ho)). hieu van bac tuc ban ((thanh van) or (thanh hai)) va triet*.