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