Perhaps you should try some spelling variations:
thanh vien » nhan vien, thanh van
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
vien cua » viec cua, dien cua, tien cua
hieu van » hieu va, thien van, lieu va
dao duc » giao duc, tao duoc
te sach » toc sach
ky tang » ky dang, kho tang, ky trong
cac duc » cac du, cao duc, cac dac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ky tang) OR (ky nang)) xa hoi. hieu van ((cac duc) or (dao duc)) ban thanh vien cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky tang) OR (ky nang)) xa hoi. hieu van ((cac duc) OR (dao duc)) ban thanh vien cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky tang) OR (ky nang)) xa hoi. hieu van ((cac duc) or (dao duc)) ban thanh vien cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky tang) OR (ky nang)) xa hoi. hieu van ((cac duc) or (dao duc)) ban thanh vien cua triet*.