Perhaps you should try some spelling variations:
sang tao » hang tai
tu sach » thu sach, su sach, te sach
sang ma » tang ma, nang ma, mang may
hang vi » hang va, hanh vi, khang voi
hang di » hang doi, hang dien, hang dich
dau xuc » dau xac, dau xua, dau nuoc
va dau » va dao
xuc va » duc va, tuc va, luc va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((sang ma) OR (sang tao)) hoi. lieu va dau xuc va ((hang di) OR (hang vi)) cua vat~.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((sang ma) or (sang tao)) hoi. lieu va dau xuc va ((hang di) or (hang vi)) cua vat*.