Perhaps you should try some spelling variations:
thanh vien » nhan vien, thanh van
thanh de » hanh de, thanh ve, thanh do
hieu van » hieu va, thien van, lieu va
cau tre » cau tren, cau treo, cuu tre
cau tra » ca tra, cau ra, cau truc
cau luc » cau truc, cau phuc
van cau » van dau, van hau, van chat
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
can ky » van ky, dan ky, ban ky
luc va » duc va, tuc va, loc va
tu can » tu ban, tu cac, thu canh

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu can ky tang xa hoi. hieu van cau luc va ((thanh de) or (thanh vien)) ((cau tre) or (cau tra))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky tang xa hoi. hieu van cau luc va ((thanh de) OR (thanh vien)) ((cau tre) OR (cau tra)).
• Adding a wildcard symbol may retrieve word variants: tu can ky tang xa hoi. hieu van cau luc va ((thanh de) or (thanh vien)) ((cau tre) or (cau tra))*.