Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh le » thinh le, thanh ve, thanh de
cham duc » pham duc, cham soc, pham duy
hanh le » hanh ve, hanh de, manh le
tu sach » thu sach, su sach, te sach
tu nong » tu cong, tu tong, tu tuong
hieu va » lieu va, hieu qua
va cham » va chat, va tham
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: tu sach ((tu nong) or (tu dong)) x hoi. hieu va cham duc va ((hanh le) OR (thanh le)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tu nong) OR (tu dong)) x hoi. hieu va cham duc va ((hanh le) OR (thanh le)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tu nong) or (tu dong)) x hoi. hieu va cham duc va ((hanh le) OR (thanh le)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tu nong) or (tu dong)) x hoi. hieu va cham duc va ((hanh le) OR (thanh le)) cua triet*.