Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
thanh di » thanh doi, thanh do, thanh dinh
thanh de » hanh de, thanh ve, thanh do
thu sach » tu sach, thuat sach, thuoc sach
va tham » van tham, va cham, va thuat
sach ky » sac ky, sach y, sach ty
duc van » duc va, duc tan, duc manh
x hoi » xa hoi, o hoi, x ho

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 nang x hoi. lieu ((va tham) or (va thanh)) duc van ((thanh di) OR (thanh de)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. lieu ((va tham) OR (va thanh)) duc van ((thanh di) OR (thanh de)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang x hoi. lieu ((va tham) or (va thanh)) duc van ((thanh di) OR (thanh de)) cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. lieu ((va tham) or (va thanh)) duc van ((thanh di) OR (thanh de)) cua triet*.