Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
cua triet » cua viet, su triet, va triet
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
duc gia » quoc gia
cua tre » cua te, cuu tre, dua tren
y sang » _ sang, duy sang
ma hoi » xa hoi, ma hoa, me hoi

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 y sang ((ma hoi) OR (mai hoi)). hieu ve pham duc gia thanh lap ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y sang ((ma hoi) OR (mai hoi)). hieu ve pham duc gia thanh lap ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y sang ((ma hoi) OR (mai hoi)). hieu ve pham duc gia thanh lap ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach y sang ((ma hoi) OR (mai hoi)). hieu ve pham duc gia thanh lap ((cua tre) or (cua triet))*.