Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
danh sai » dung sai, danh bat, danh dau
ve pham » vi pham, v pham, ve phan
va danh » va dinh, va dan, va hanh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
song xa » song cua
sang xa » lang xa, sang ma, mang xa
hieu ve » hieu va, hieu van

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