Perhaps you should try some spelling variations:
thanh vien » nhan vien, thanh van
cua triet » su triet, va triet
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thuoc sach
cua viet » ca viet, hoa viet, cua vat
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
cac ho » cac hop, cac hoc, cac co
ho van » hoc van, vo van, so van
ha hoi » hoa hoi, ha noi, va hoi
ve cac » va cac, vien cac

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

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