Perhaps you should try some spelling variations:
dang tao » sang tao, nang tao, vang tao
su sach » so sach, vu sach
hanh va » hang va, hanh vi
hanh ve » hanh vi, hanh kem
luc van » luoc van, luu van, duc van
su hien » su kien, su tien, thu hien
sach vu » sach va, sach tu, sach uu
tao hoi » tao khoi, tao boi, tay hoi
vu dang » su dang, vu quang, cua dang
va dao » ca dao
va cao » va cac, va co, va bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach vu dang tao hoi. hieu ((va cao) or (va dao)) luc van ((hanh ve) OR (hanh va)) su hien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach vu dang tao hoi. hieu ((va cao) OR (va dao)) luc van ((hanh ve) OR (hanh va)) su hien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach vu dang tao hoi. hieu ((va cao) or (va dao)) luc van ((hanh ve) OR (hanh va)) su hien".
• Adding a wildcard symbol may retrieve word variants: su sach vu dang tao hoi. hieu ((va cao) or (va dao)) luc van ((hanh ve) OR (hanh va)) su hien*.