Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
pham huu » pham duc, pham duy, phan huy
toc sach » hoc sach, doc sach, thuoc sach
thi cong » tai cong, thien cong
chu bang » thu bang, chuc nang, chu quang
va hanh » van hanh, va danh, ban hanh
hieu v » hieu va, hieu ve, hieu 2
v pham » vi pham, d pham

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((chu bang) or (thi cong)) xa hoi. hieu v pham huu ((va hanh) OR (va thanh)) dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((chu bang) OR (thi cong)) xa hoi. hieu v pham huu ((va hanh) OR (va thanh)) dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((chu bang) or (thi cong)) xa hoi. hieu v pham huu ((va hanh) OR (va thanh)) dai cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach ((chu bang) or (thi cong)) xa hoi. hieu v pham huu ((va hanh) OR (va thanh)) dai cua triet*.