Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
lang van » dang van, tang van, hoang van
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
thu sach » tu sach, thuat sach, thuoc sach
cac luc » coc luc, cac nuoc, cac cuoc
cau luc » cau truc, cau phuc
lang xa » lang ha, dang xay
lai cua » dai cua, hai cua, lai chau
hieu va » lieu va, hieu qua
sach 2 » sach y

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach 2 ((lang xa) OR (lang van)) hoi. hieu va ((cac luc) or (cau luc)) van hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach 2 ((lang xa) OR (lang van)) hoi. hieu va ((cac luc) OR (cau luc)) van hanh lai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach 2 ((lang xa) OR (lang van)) hoi. hieu va ((cac luc) or (cau luc)) van hanh lai cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach 2 ((lang xa) OR (lang van)) hoi. hieu va ((cac luc) or (cau luc)) van hanh lai cua triet*.