Perhaps you should try some spelling variations:
sach thameu » sach thieu
sach tham » sach nha
van doanh » toan doanh, van dong, van thanh
doanh van » doan van, doanh va, doanh ban
cua triet » cua viet, su triet, va triet
hanh vu » hanh vi, hanh va, hanh tu
van cua » vang cua, ban cua, dan cua
vu hai » su hai, vu ha
va dam » van dam, va dao, va dau
dam tu » nam tu, cam tu, tam tu
tu van » tu 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 tham) or (sach thameu)) hanh vu hai. lieu va dam tu van doanh van cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach tham) OR (sach thameu)) hanh vu hai. lieu va dam tu van doanh van cua triet.
• Adding a wildcard symbol may retrieve word variants: thu ((sach tham) or (sach thameu)) hanh vu hai. lieu va dam tu van doanh van cua triet*.