Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
thu san » thuy san, thu ban, phu san
cu tren » tu tren, dua tren
san ky » sang ky, van ky, dan ky
di ban » dia ban, doi ban, di san
ma hoi » mai hoi, xa hoi, me hoi
cu tre » cua tre, cuu tre, cu tri
nam di » nam doi, nam da, nam do

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 ((ma hoi) or (ma hoa)). hieu van nam di ban thanh van ((cu tre) OR (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu san ky nang ((ma hoi) OR (ma hoa)). hieu van nam di ban thanh van ((cu tre) OR (cu tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu san ky nang ((ma hoi) or (ma hoa)). hieu van nam di ban thanh van ((cu tre) OR (cu tren))".
• Adding a wildcard symbol may retrieve word variants: thu san ky nang ((ma hoi) or (ma hoa)). hieu van nam di ban thanh van ((cu tre) OR (cu tren))*.