Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
sach thi » sach thu, sach tai, sach tham
hanh dai » hanh tai, hanh dao, vanh dai
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, vuc van
hanh xa » hanh va, hanh ma, hanh xu
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai
dai va » mai va

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