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
pham duy » pham duc
cham duc » pham duc, cham soc, phan duc
sach tu » sach thu, cach tu, sach ty
lai cua » dai cua, hai cua, lai chau
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
lanh va » hanh va, anh va, lanh dao
lanh xa » lang xa, canh xa, lanh xuan

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