Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham duc » pham duc, cham soc, pham duy
te sach » toc sach
tu cong » thu cong, te cong, thi cong
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
hanh le » thanh le, hanh ve, hanh de
le cua » ly cua
o hoi » co hoi, o hoc, o hai

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 ((tu cong) OR (tai cong)) o hoi. hieu va cham duc va hanh le cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu cong) OR (tai cong)) o hoi. hieu va cham duc va hanh le cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu cong) OR (tai cong)) o hoi. hieu va cham duc va hanh le cua triet*.