Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
tham soc » cham soc, tham nuoc, thai son
va tham » van tham, va cham, va thanh
su sach » so sach, vu sach
ma hoi » mai hoi, ma hoa, me hoi
soc va » hoc va, loc va, doc va
va dan » ca dan, va dao, va dau
dan di » danh di, dan da, dan de

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach _ sang ((ma hoi) or (xa hoi)). lieu va tham soc va dan di ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach _ sang ((ma hoi) OR (xa hoi)). lieu va tham soc va dan di ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: su sach _ sang ((ma hoi) or (xa hoi)). lieu va tham soc va dan di ((cua triet) or (va triet))*.