Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa
hieu van » hieu va, thien van, lieu va
bach ky » bac ky
van cam » van nam, van lam, van cau
cam tuc » cam xuc, cam tu, nam thuc
tuc gia » tac gia, duc gia, toc gia
cua tu » cua tuc, cua su, cua cu
o hoi » co hoi, o hoc, o hoa
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ky nang ((o hoi) OR (o hai)). hieu van cam tuc gia ((thanh hai) or (thanh san)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ky nang ((o hoi) OR (o hai)). hieu van cam tuc gia ((thanh hai) OR (thanh san)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu bach ky nang ((o hoi) OR (o hai)). hieu van cam tuc gia ((thanh hai) or (thanh san)) cua tu".
• Adding a wildcard symbol may retrieve word variants: vu bach ky nang ((o hoi) OR (o hai)). hieu van cam tuc gia ((thanh hai) or (thanh san)) cua tu*.