Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
thu san » thuy san, thu ban, phu san
van cau » van dau, van hau, van chat
cau duc » cao duc, cau luc, chu duc
tai cua » thai cua, tai cuc, tri cua
san ky » sang ky, van ky, dan ky
cua cu » cua chu, cua cau, cua su
x hoi » xa hoi, x ho, 5 hoi
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: thu san ky nang ((x hoi) or (o hoi)). hieu van cau duc va thanh tai cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu san ky nang ((x hoi) OR (o hoi)). hieu van cau duc va thanh tai cua cu.
• Adding a wildcard symbol may retrieve word variants: thu san ky nang ((x hoi) or (o hoi)). hieu van cau duc va thanh tai cua cu*.