Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach tham
dong van » duong van, dang van, dong von
va triet » va thiet, va trien, ve triet
hanh su » hanh sua, hinh su, hanh tu
su hai » su tai
va cam » va cham, va cac, va cao
cam tu » cam thu, nam tu, dam tu
tu van » tu va
van va » van vat, van van, ban va

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 thi) or (sach thieu)) hanh su hai. lieu va cam tu van dong van va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach thi) OR (sach thieu)) hanh su hai. lieu va cam tu van dong van va triet.
• Adding a wildcard symbol may retrieve word variants: thu ((sach thi) or (sach thieu)) hanh su hai. lieu va cam tu van dong van va triet*.