Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
sach thu » sach thue, sach thieu, sach tham
van hanh » van thanh, ban hanh, van anh
ve cham » va cham, ve chat, vu cham
lai cua » dai cua, hai cua, lai chau
duc van » duc va, duc tan, duc manh
sach ty » sach y, sach tu, xach tay
lang xa » lang ha, dang xay, lang van
ve cam » ve cac, va cam, ve cai

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