Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
cham duc » pham duc, cham soc, pham duy
hieu va » lieu va, hieu qua
lai cua » dai cua, hai cua, lai chau
duc van » duc va, duc tan, duc manh
te sach » toc sach
hieu ve » hieu van
tu nang » tru nang, tu nong, tu nano

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 nang) or (truc nano)) xa hoi. ((hieu ve) OR (hieu va)) cham duc van hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nang) OR (truc nano)) xa hoi. ((hieu ve) OR (hieu va)) cham duc van hanh lai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu nang) or (truc nano)) xa hoi. ((hieu ve) OR (hieu va)) cham duc van hanh lai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nang) or (truc nano)) xa hoi. ((hieu ve) OR (hieu va)) cham duc van hanh lai cua triet*.